I think i got my mind set on the holley intake mainifold for the 670 tbi i will be getting but im still not so sure. ive heard of hood clearance and egr problems. I need something that is smog legal and that will pass emissions. If anyone can goive me some advice i would be pretty happy.

 

Holley makes a 4bbl carb manifold that you can use an adaptor plate on and will fit the stock hood and has EGR. I cant remember the part number but I can get it to you soon....

 

iroc22
if you do manage to come accross that part number please post it, I am interested in the same one.

 

Holley Stealth PN#7525 has EGR and frt manifold height of 3.5" and a rear of 4.5" which will fit perfectly. The only problem with this manifold is that it's only available for the pre 86 intake bolt pattern; so unless you're changing your heads or wanna modify the ones you're using, then you can't use that intake. There's also PN#300-64 which is a dual plane instead and will fit the stock heads (intake bolt pattern). The height however is 3.68" front and 5.02" which will be a squeeze to fit under the stock hood. You will probably have to remove the insulation and maybe run a lower height air cleaner. Both manifolds will require a 4bbl to TBI adaptor plate. Holley makes one, but it's way more economical to make your own outta some plastic.

 

How is the projection maifold holley makes?

 

They're fine, but they're pretty tall for a stock Firebird/Camaro hood.

 

I was plannin on goin with the PN#300-64 manifold but is there anyone who has tried using it, problems and what not? Also will a 14 by 3inch drop base aircleaner fit.