Rectangular port intake / heads
Thread Starter
Instructor
Joined: Aug 2016
Posts: 172
Likes: 2
Rectangular port intake / heads
Hi Guys,
Considering options - but not sure on compatibility!
I've got a good set of 3994026 heads on my car - mildly ported/rebuilt 118cc open chamber rectangular port heads...
currently matched with the correct OEM high rise 4 bbl rectangular port manifold and topped with a Holley 750cfm ultra double pumper.
Currently have a (cheap repro) L88 hood that i'd like to get rid of - but the manifold/carb/air cleaner have hood clearance issues with a standard big block corvette hood.
the question i have is - are all rectangular port heads created equal? can i use any rectangular port head manifold with these heads, or would some machine work be required to port match some manifolds?
the reason i ask is because i've got my eye on a 3894374 67 tripower setup that i could get my hands on for reasonable money... would it fit? if not, what would? (both the heads and under the hood!)
many thanks for your thoughts!
dave
Considering options - but not sure on compatibility!
I've got a good set of 3994026 heads on my car - mildly ported/rebuilt 118cc open chamber rectangular port heads...
currently matched with the correct OEM high rise 4 bbl rectangular port manifold and topped with a Holley 750cfm ultra double pumper.
Currently have a (cheap repro) L88 hood that i'd like to get rid of - but the manifold/carb/air cleaner have hood clearance issues with a standard big block corvette hood.
the question i have is - are all rectangular port heads created equal? can i use any rectangular port head manifold with these heads, or would some machine work be required to port match some manifolds?
the reason i ask is because i've got my eye on a 3894374 67 tripower setup that i could get my hands on for reasonable money... would it fit? if not, what would? (both the heads and under the hood!)
many thanks for your thoughts!
dave
Melting Slicks
Joined: Feb 2006
Posts: 3,105
Likes: 96
From: Sunrise FL
They should match up OK, but be aware are oval port tri power manifolds too.
If I recall the rectangle port OEM 4 barrel is a low/mid rise and fits under a BB hood with dropped air cleaner.
If I recall the rectangle port OEM 4 barrel is a low/mid rise and fits under a BB hood with dropped air cleaner.
Last edited by mikem350; Nov 17, 2016 at 04:57 PM.
Race Director
Joined: Jan 2000
Posts: 13,025
Likes: 2,266
From: Corsicana, Tx
2020 C2 of the Year - Modified Winner
2020 Corvette of the Year (performance mods)
C2 of Year Winner (performance mods) 2019
2017 C2 of Year Finalist
It will fit heads fine but remember the C2 intake is taller than the C3 one.
Jim.
Jim.
