ive got a 79 L-82 and a tight budget, i found some heads that i think could add some power to the L-82, this is the info

CHEVY 350 SMALL BLOCK PERFORMANCE CYLINDER HEADS

THESE CYLINDER HEADS HAVE THE FOLLOWING:
283, 305, 327, 350, 383 & 400 APPLICATIONS.
CONVERTED 305 CASTINGS #416, 434, 450 & 601.
64cc COMBUSTION CHAMBER.
170cc INTAKE RUNNER.
ALL HEADS COME WITH STAINLESS .160 EX & .202 IN VALVES.
STEAM HOLES DRILLED FOR 400 APPLICATIONS NO CHARGE.
ALL HEADS COME WITH ACCESSORY HOLES.

MACHINE WORK:
Heads are thoroughly cleaned and inspected.
Pressure tested to ensure no cracks or leaks.
3 Angle valve grind.
Pocket Ported under valve seats.
CBN milled to ensure straightness and correct RA surface finish.
Machined with new thick wall valve guides.
Assembled with new stainless 2.02 swirl polished intake valves.
Assembled with new stainless 1.60 swirl polished exhaust valves.
Machined with new hardened exhaust seats for unleaded fuel.
Hardened valve keepers.
New .550 lift valve springs.
Fresh valve seals.
Heads are complete and ready to install.

ADD $50.00 FOR SCREW-IN STUDS, GUIDE PLATES AND HARDENED PUSH RODS.

Will these give me a pump in performance? Will be using a edelbrock 2101 intake and either my qjet or an avs2 650cfm with it
thanks

 

Yes, they will give you a bump in performance over a regular 305 head. I assume they are not angle plug heads so it might be harder to change plugs with headers on..

 

not really. iron chevy heads are iron chevy heads. 2.02 valves are a miniscule flow improvement. used vortecs would be better.

 

ive got stock heads on it now, 79 l82, trying to figure out how much performance could potentially be gained from these over the stock ones

 

you need heads, cam, headers and intake all at once if you want to see a real improvement. those heads are a waste of money. ANY "performance" small block head that is a stock iron GM head is bullasheeta. the only justification for any stock head other than a 96-02 vortec-and they are marginal-is numbers matching for show points or they are paid for and they work. you will not see or feel any diff between your L82 heads and these. unless your heads are shot. and then the diff is condition, not upgrade.

 

Not sure what your looking at but beware the chevy “lightweight” heads. They are prone to cracking. You can identify them by looking at the lower edge and see if it is straight or scalloped. Personally I would not waste my money on them. Look for some good iron vor tec chevy heads. Probably be close to same price with lots better performance.

 

Already have headers installed, have a 2101 intake ready to go and im fine with the L82 cam, dont really wanna buy a vortec intake if i can help it, im just looking for some advice on the information from those specific heads and potentially what type of performance "good or bad" over stock L82 im lookin at

 

They will give you a 'bump' in compression ratio. They will NOT give you any significant performance improvement. It's been done and some who have attempted it "claim" it was a good move. Others who have tried it say otherwise. If you give it a 'go', let us know how it worked out.

 

The flow rate is the most important, compression ratio due to small combustion chamber is second. There is no price listed but you would have to pay the extra $50 for the screw in studs. Never go with press in as they are prone to pull out. You are best off with some vortec heads that have been set up for your gen motor or some cheap aluminum heads. There are plenty of them on the internet

 

Were the stock oem studs on the car for the last 40 years pressed in or screwed in? Ive always read the screwed in studs have more merit with larger lift cams myself. I am replacing my 64cc iron dart heads with some cheap aluminum 64cc heads myself because they have better flow and are lighter. Thet do have screw in studs but I also have an aftermarket roller cam and 1.6 RR's. OP if you want something you can just bolt on and not have to worry I would suggest something like these. they will give you a nice performance boost potential over any chevy heads. https://www.ebay.com/itm/33391577920...wAAOSwvgdW2LNy I went with the same castings I bought bare. these are also sold as the AFR enforcer line of sbc heads.

 

Complete waste of money. A lot of work for maybe 20 hp improvement......plus there are problems with this.
First problem is the chamber spec is 64cc.....305 heads were 58cc......the other is the "2.02" valves. Stock was 1.760 intake 1.500 exhaust.....they would be adding a quarter inch to the diameter of the intake valave and I want to know how they did that......the chamber would have to be opened up with a chamber "hog mill" and after that....the bowl area cut with a "bowl hog" to open it up enough to even get the cutter in there to cut a 2.02 intake seat......then ALL of that is worth squat unless the bowl area is blended in with a carbide, which would require a LOT of work.
Run from this......
Buy a pair of used Dart or World heads.....I bought a pair of Dart Iron Eagles with 2000miles on them that were perfect three years ago for $500.....I was going to use them on my 406 (money was tight then, three stepdaughters, inbetween jobs, etc.....) but I caught a windfall and purchased some Pro 1 200's in aluminum......we put these heads on my buddies 355 that we built with a vintage Dyer's 6/71 blower......it makes 550hp all day long......
Put it this way......the 66' in my avatar had 461 2.02/2.60 heads that had over 80 hours of work in them to get to where a stock out of the box Performer RPM head flows.......over $2000 in parts and labor 13 years ago.......not a good investment on return for power.
Keep shopping......search Ebay everyday for used heads....Dart, World or otherwise......this would be the way I would go.

Jebby

 

^ My first thought was that I thought 305 heads were 58cc but wasnt sure if they all were.. The dart iron eagles o my car now were only $300 for the pair with comp springs and harland sharp 1.6 roller rockers so I agree with Jebby lots of deals to be had if you buy used when someone else decides to upgrade.

 

It's been said by many, but if you are dead set on OEM, get Vortec heads. If not get some AFR enforcers if you want to bolt on, if not buy some bare casting aluminum ebay heads and build them the way you want

 

the probably gore them out about 6 cc's to make them into 462624's with 2.02's. what is the price of these heads?

 

Changing to 64 cc chambers are worthwhile but again Jebby is right,any aftermarket heads will be better than anything factory built. The vortices are overrated in my view.

 

one thing i will say for vortecs. they don't come with 2 dollar chinese valves. which is what 7t9 is saying. don't buy chinese heads full of chinese valves and springs. buy bare castings and good hardware. 6000 rpm. those valves open and close 30 times a second.

 

The skip white heads I linked above have PBM valves and a good track record as far as I can find. They are assembled by skip white just as blueprint and AFR assembled their own versions of these castings.

 

i didh.t see skip white was the seller. he has a rep for building good heads. and engines.

 

The only way using 305 heads on a 350 makes sense is if you already own the 305s and have very little funding for the rebuild................................. ......buying some vs ALL the better options =

FYI - i just picked up some vette alum L98 heads for $50, there's also a set of redone 906 vortecs on local CList asking $350....................................

 

w/jebby. Those heads would take an extensive amount of work to make 2.02s work..even then they dont flow for beans.
Those were designed for vans and trucks, TBI engines in the 80s. They can be improved but....
There are plenty of decent USA made performance iron heads out there guys overlook cause they are iron. Youll never feel 40-50 lbs when youre in the car.