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C5 guy needs help building 327 please :)

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Old Aug 27, 2007 | 11:45 PM
  #21  
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Originally Posted by Little Mouse
I Think procomp is a chinese set of heads, you can't be old school
with chinese heads. I know $1050.00 for brodix is not as cheap,
but Brodix has been making aluminum heads since the 70s they are
first rate and very reasonable fo the money. A good set of used
Edelbrocks would be good, or the 58cc chamber aluminum vette
heads. Henery Ford is already upset with the chevy engine, and now
your going chinese on him.
How are they any less old school than a new set of Vortecs I ran into another guy with a 37 tonight, he had an SBC swap too. He had a nice Mustang II IFS in there, gave me lots to think about. I think more people would put SBF's in the older fords if the engine bays weren't so short, there is NO room in front of that engine!
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Old Aug 28, 2007 | 12:01 AM
  #22  
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Originally Posted by Mike94ZLT1
How are they any less old school than a new set of Vortecs I ran into another guy with a 37 tonight, he had an SBC swap too. He had a nice Mustang II IFS in there, gave me lots to think about. I think more people would put SBF's in the older fords if the engine bays weren't so short, there is NO room in front of that engine!
Yep the chevy is shorter big reason there are a lot of them in street
rods. If you do really want to look old school under the hood only
iron heads would do. Three dueces or two fours would be the ticket
for old school hot rod. Offenhauser has new three duece manifolds.
Edelbrock has a new high rise two four setup.

Last edited by Little Mouse; Aug 28, 2007 at 12:08 AM.
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Old Aug 28, 2007 | 12:04 AM
  #23  
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Originally Posted by Little Mouse
Yep the chevy is shorter big reason there are a lot of them in street
rods. If you do really want to look old school under the hood only
iron heads would do.
I wonder what heads are on there now, and if they would be worth freshening up?
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Old Aug 28, 2007 | 01:01 AM
  #24  
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Originally Posted by Mike94ZLT1
I wonder what heads are on there now, and if they would be worth freshening up?
If the heads are original 327/ 275 horse heads they would be
small valve 194/150, pressed in studs. If they happen to be
202/160 valve heads screw in studs off a later engine with
the same 64cc chambers, they might be worth messing with
if the costs to redo them does not go very high. Performance
wise modern heads would be better, but if your HP goal is not
that high about anything can work. There is a Summit iron head
that is mostly a new replacement head that has 67cc chambers
165 runner 202/160 valves, screw in studs. Same price tag as the chinese aluminum head. Part # SUM-152123 $649.00
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Old Aug 28, 2007 | 09:59 AM
  #25  
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Originally Posted by Little Mouse
If the heads are original 327/ 275 horse heads they would be
small valve 194/150, pressed in studs. If they happen to be
202/160 valve heads screw in studs off a later engine with
the same 64cc chambers, they might be worth messing with
if the costs to redo them does not go very high. Performance
wise modern heads would be better, but if your HP goal is not
that high about anything can work. There is a Summit iron head
that is mostly a new replacement head that has 67cc chambers
165 runner 202/160 valves, screw in studs. Same price tag as the chinese aluminum head. Part # SUM-152123 $649.00

Those are some tiny springs on there! Will they handle the 268H's lift and duration?

218/218 .454/.454 on a 110? I know thats small but better safe than sorry!

http://store.summitracing.com/partde...2&autoview=sku
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Old Aug 28, 2007 | 01:00 PM
  #26  
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Originally Posted by Mike94ZLT1
Those are some tiny springs on there! Will they handle the 268H's lift and duration?

218/218 .454/.454 on a 110? I know thats small but better safe than sorry!

http://store.summitracing.com/partde...2&autoview=sku
All the factory springs were 1.250 Dia. They will handle 454 lift no problem.
There are all kinds of springs available that can handle way over 500 lift
with the the stock 1.7 installed height. Go a little higher on lift.
Dual pattern cams are better with the weak exhaust flow of factory heads.

Last edited by Little Mouse; Aug 28, 2007 at 02:23 PM.
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Old Aug 28, 2007 | 04:08 PM
  #27  
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LSA is a little wide 112 but this cam and lifter kit is nice,
LUN-60102LK
int. .050, 219
ex. .050, 227
lift int. .468
lift ex. .489

Keeps the intake duration low, gives more lift on the intake
and gives a lot more duration/lift on the exhaust.
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Old Aug 28, 2007 | 04:23 PM
  #28  
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Originally Posted by Little Mouse
LSA is a little wide 112 but this cam and lifter kit is nice,
LUN-60102LK
int. .050, 219
ex. .050, 227
lift int. .468
lift ex. .489

Keeps the intake duration low, gives more lift on the intake
and gives a lot more duration/lift on the exhaust.
In addition to making more power that should sound a little meaner too! Thanks!
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Old Aug 28, 2007 | 08:14 PM
  #29  
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Originally Posted by Mike94ZLT1
In addition to making more power that should sound a little meaner too! Thanks!
The 112 LSA will mellow the exhaust, smoother idle. tighter LSA
would give a more rumpity exhaust, look a around you can find
a dual pattern cam with good lift and a little tighter LSA.
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Old Aug 28, 2007 | 08:26 PM
  #30  
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There is a very good discussion going on in the C-2 section about the chevy heads (gearheads,help needed,461 heads). In the flow of this discussion, several very good points are made concerning the 327 engine, how to stroke it to a 350/383, hot rodding it,and other info. This is from the guys that still run them and are in the know. It will remain looking like a 327 on the outside.
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Old Aug 30, 2007 | 07:49 PM
  #31  
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I like the idea of keeping it old school with the Iron "fuelie" duoble hump heads. As said earlier if its a 327 275 motor it probably had the double hump 1.94 intake valve heads on it. Assuming this couldnt he have them machined for 2.02 valves? Seems like it would be cheaper and those heads should do fine with the cam/rear ratio he has listed. Good post. Thought provoking!
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Old Aug 30, 2007 | 09:39 PM
  #32  
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This is the carb setup to run on that!
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Old Aug 30, 2007 | 09:40 PM
  #33  
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Originally Posted by L Holmes
I like the idea of keeping it old school with the Iron "fuelie" duoble hump heads. As said earlier if its a 327 275 motor it probably had the double hump 1.94 intake valve heads on it. Assuming this couldnt he have them machined for 2.02 valves? Seems like it would be cheaper and those heads should do fine with the cam/rear ratio he has listed. Good post. Thought provoking!
Sure he could do that, but by the time you pay for new valve seats
for both intake and exhaust to get to 202/160 valves, all new valves, then the guides probably need work, then theres the cost of new springs. the head
would still have pressed in studs. probably better off to just by a
new set of summit heads, with 202/160 valves, screw in studs,
everything brand new and no chance of a machine shop screwup.

Last edited by Little Mouse; Aug 30, 2007 at 09:46 PM.
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Old Aug 31, 2007 | 12:41 AM
  #34  
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Originally Posted by 63mako
This is the carb setup to run on that!
Ya that would be a good one, just ship it to him as a donation
to hot rodding. Hot rods should have some form of more then one carb,
its an unwritten rule.

Last edited by Little Mouse; Aug 31, 2007 at 12:50 AM.
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Old Aug 31, 2007 | 12:57 AM
  #35  
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Originally Posted by stingr69
There is a retro-fit GM hot cam setup you could use to retro fit the GM HOT cam into your old 327 but it is rather pricey at $1000 or so. You do get a lot of parts for the money but still that is just a little too much for this appication IMHO.
That's nuts. You can use the 60* V6 lifters and the V8 dogbones and spider, and have factory roller reliability for far, far less than $1k.

The best part is, it still has that classic hot rod "make do with what ya got" ingenuity.
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Old Aug 31, 2007 | 09:37 AM
  #36  
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Originally Posted by L Holmes
I like the idea of keeping it old school with the Iron "fuelie" duoble hump heads. As said earlier if its a 327 275 motor it probably had the double hump 1.94 intake valve heads on it. Assuming this couldnt he have them machined for 2.02 valves? Seems like it would be cheaper and those heads should do fine with the cam/rear ratio he has listed. Good post. Thought provoking!
I like the fuelie heads too but I would not advise adding the bigger valves. The valve bowls will need to be hogged out but many shops can do that work. The real issue is the chamber modifications required to make the upgrade work. In order to get better flow from the modification you must unshroud the chamber around the periphery of the intake valve. The factory found that the flow would actualy decrease if you just made the valves bigger and did not machine the combustion chamber. All double humps will have this chamber machine work on the 2.02"/1.6" versions of the heads if they were originaly equipped with the big valves. Most machine shops are not able to perform this modification. Many shops will not know about the reason for the chamber work and will say it is not needed. You will not get the performance increase without the extra work and you will increse the chance for cracking the head.

If you have 1.94"/1.5" valves you should probably keep them that way. If you want to just upsize the exhaust to 1.6" that would not be a bad idea. The exhaust port is a little weak as delivered anyway so that can only help.

-Mark.
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Old Aug 31, 2007 | 01:55 PM
  #37  
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I have not seen a summit head, but its probably like all the
modern heads has the heart shaped combustion chamber
that helps unshroud the valves.
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