What hood needed for 69 with the goal of 350 hp at the rear wheels
#1
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Thread Starter
What hood needed for 69 with the goal of 350 hp at the rear wheels
While I have been focusing on the body and chassis of my 69 hot rod rebuild, I am now turning my attention to the engine.
It came with a 350 ci/ 350 hp engine, but I want more torque and power,
say 350 hp at the rear wheels.
I am currently thinking going to a 383 with a holly sniper efi but am open to suggestions
I am pondering if I can run the stock hood with this type of set up?
Will there be enough clearance? That would be my first choice
If not, what are my hood options? I prefer not to go with the L88 style hood.
I want to get this somewhat sorted out so I can mod or replace the hood before the body gets painted
Thanks for the help
Glenn in San Diego
It came with a 350 ci/ 350 hp engine, but I want more torque and power,
say 350 hp at the rear wheels.
I am currently thinking going to a 383 with a holly sniper efi but am open to suggestions
I am pondering if I can run the stock hood with this type of set up?
Will there be enough clearance? That would be my first choice
If not, what are my hood options? I prefer not to go with the L88 style hood.
I want to get this somewhat sorted out so I can mod or replace the hood before the body gets painted
Thanks for the help
Glenn in San Diego
#2
I had a 383 with an RPM Air Gap and stock drop air cleaner/3" element that made 327RWHP through a T56. I used steel motor mounts that I reworked to lower the engine about .200". Just fit under a BB/LT-1 hood. I dynoed it with a small hydraulic flat tappet cam. After I switched to a larger solid roller the car really woke up but no numbers for that configuration.
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gleninsandiego (02-23-2018)
#3
Melting Slicks
I have a ZZ4 350 based engine, GM's LT4 "hot cam", 1/2" carb spacer, and a Moroso drop base air cleaner that is making 328 RWHP through a Richmond 5 speed manual. Still using the stock 76' hood.
This is a pretty mild setup, so if you went with a 383 or larger w/ a roller cam, I would think your stock hood would work. Good Luck
This is a pretty mild setup, so if you went with a 383 or larger w/ a roller cam, I would think your stock hood would work. Good Luck
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gleninsandiego (02-23-2018)
#4
Pro
I have a ZZ4 350 based engine, GM's LT4 "hot cam", 1/2" carb spacer, and a Moroso drop base air cleaner that is making 328 RWHP through a Richmond 5 speed manual. Still using the stock 76' hood.
This is a pretty mild setup, so if you went with a 383 or larger w/ a roller cam, I would think your stock hood would work. Good Luck
This is a pretty mild setup, so if you went with a 383 or larger w/ a roller cam, I would think your stock hood would work. Good Luck
Dos the shifter line up where the stock one was?
#5
Power, and when the power comes on, is determined by displacement, camshaft and airflow (predominately heads).
What is your budget?:
What rpm peak do you desire?
350 or 383?
Once those 3 are answered then the next two of heads and camshaft can be narrowed down to maybe 12-15 combinations.
If that makes your head hurt then consider a OTC crate engine already built to your goals. Likely less expensive in the long run and reduces downtime for more quality driving time.
R
Last edited by Dynra Rockets; 02-23-2018 at 07:59 AM.
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gleninsandiego (02-23-2018)
#6
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Hi Glenn,
"I am pondering if I can run the stock hood with this type of set up?
Will there be enough clearance? That would be my first choice"
"If not, what are my hood options? I prefer not to go with the L88 style hood."
Have you considered the BB/LT-! hood?
Might that give you the extra clearance you could need?
Regards,
Alan
"I am pondering if I can run the stock hood with this type of set up?
Will there be enough clearance? That would be my first choice"
"If not, what are my hood options? I prefer not to go with the L88 style hood."
Have you considered the BB/LT-! hood?
Might that give you the extra clearance you could need?
Regards,
Alan
#8
Safety Car
you gain maybe ... 3/8" with BB/ LT1 hood.
look for more hood clearance if your adding intake height.
look for more hood clearance if your adding intake height.
Last edited by 69Vett; 02-23-2018 at 11:45 AM.
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gleninsandiego (02-23-2018)
#9
I don't have dyno numbers but one that fit under the small block hood was a 350 I did in the 70's that would trap at 108.8 and was fine in traffic. I used an original Torker on that one.
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gleninsandiego (02-23-2018)
#11
Safety Car
Thread Starter
Thanks for all the replies
Great food for thought
While I like the LT1/BB hood looks, it doesn't sound
like it will give me much extra room
Which drives me to the L88 hood, or
sticking with a low rise manifold and the stock hood
So can I get the 350 at the rear wheels with the low rise
manifold? It sounds like that may be possible
Glenn in San Diego
Great food for thought
While I like the LT1/BB hood looks, it doesn't sound
like it will give me much extra room
Which drives me to the L88 hood, or
sticking with a low rise manifold and the stock hood
So can I get the 350 at the rear wheels with the low rise
manifold? It sounds like that may be possible
Glenn in San Diego
#12
Instructor
my 68 has a 75 hood on it i believe, i have a victor jr. intake and with that combo i could fit a 3" filter with a little modification of the top of the air cleaner and a drop base.
i changed it over to a 2" element and put an air cleaner lid on that didnt have to be smashed down.
now if a bb/lt1 hood gives more clearance than my hood one would think you could easly make that work instead of having to go with the l88 hood.
i changed it over to a 2" element and put an air cleaner lid on that didnt have to be smashed down.
now if a bb/lt1 hood gives more clearance than my hood one would think you could easly make that work instead of having to go with the l88 hood.
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gleninsandiego (02-25-2018)
#13
No guarantees but my recollection is small to tall:
'68-'72 small block
'68-'72 big block/LT-1
'73-'79
L88
IIRC the '80-'82 is lower than the '73-'79 but I don't know how it compares with wiper door hoods.
'68-'72 small block
'68-'72 big block/LT-1
'73-'79
L88
IIRC the '80-'82 is lower than the '73-'79 but I don't know how it compares with wiper door hoods.
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gleninsandiego (02-25-2018)