Not Sure if this is right forum - need advice on an intake

rogus

Greasemonkey
Mar 14, 2020
232
28
I would like to drop an early style set of vortec heads on my slightly modified sbc 355. However would like to still use my edelbrock intake that fits my current set of Gen 1 stock heads. Anyone have any recommendations? Does anyone build a set of vortec style heads that would allow me to do this?
 

565bbchevy

Geezer
Aug 8, 2011
9,196
113
Michigan
I have these in my Regal on my mild 355 SBC with a Howard's roller cam and they work very well.
 
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stew86MCSS396

Apprentice
Aug 1, 2022
81
18
(808)
19331470_2017b_540x300.jpg

https://www.gmperformancemotor.com/parts/19331470.html These come with vortec vertical intake bolts as well as the "early style" intake bolts. I'm not sure if these would have the larger raised ports that vortecs have and would create a mismatch with the intake that you're trying to reuse. However been told people try all sorts of things like early style intake on a vortec head with double intake gaskets. Not sure how they overcome the different angle intake bolts which seems to me to be too much work for my liking.
 
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Ernest

Master Mechanic
Apr 28, 2016
334
63
Texas
ROGUS.... out of curiosity, how slightly modified is your 355 engine?

Stew86mcss396 suggestion is good as well if your looking for cast iron heads, you should be close to 9.5:1cr depending on piston design/gasket thickness/piston in the hole, and they have the dual bolt pattern you'll need to reuse your 1st gen and vortec style intakes, along with the other nice specifications and for overall power with a flat tappet cam, they are much better than the earlier heads you seek.
 
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rogus

Greasemonkey
Thread starter
Mar 14, 2020
232
28
ROGUS.... out of curiosity, how slightly modified is your 355 engine?

Stew86mcss396 suggestion is good as well if your looking for cast iron heads, you should be close to 9.5:1cr depending on piston design/gasket thickness/piston in the hole, and they have the dual bolt pattern you'll need to reuse your 1st gen and vortec style intakes, along with the other nice specifications and for overall power with a flat tappet cam, they are much better than the earlier heads you seek.
 

rogus

Greasemonkey
Thread starter
Mar 14, 2020
232
28
RV Cam - flat tappet, Holley 600cfm carb, Edelbrock Eps intake, flat top pistons - around 9:1 cr, mid-length headers
 

stew86MCSS396

Apprentice
Aug 1, 2022
81
18
(808)
Sorry I'm by no means an engine builder. I merely wanted show a picture of a head that has that option of either intake bolt patterns...then I included the link so you didn't think I was smoking something.
 
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rogus

Greasemonkey
Thread starter
Mar 14, 2020
232
28
Sorry I'm by no means an engine builder. I merely wanted show a picture of a head that has that option of either intake bolt patterns...then I included the link so you didn't think I was smoking something.
I'm not either. Trying to learn as I go so I always appreciate any responses.
 

rogus

Greasemonkey
Thread starter
Mar 14, 2020
232
28
19331470_2017b_540x300.jpg

https://www.gmperformancemotor.com/parts/19331470.html These come with vortec vertical intake bolts as well as the "early style" intake bolts. I'm not sure if these would have the larger raised ports that vortecs have and would create a mismatch with the intake that you're trying to reuse. However been told people try all sorts of things like early style intake on a vortec head with double intake gaskets. Not sure how they overcome the different angle intake bolts which seems to me to be too much work for my liking.
unfortunately a bit out of my price range.
 

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