I've got a '91 383TBI that's making the swap to carb. I'm intake shopping. These are the 3 manifolds I can find that are designed to go with the centerbolt cast iron heads I've got on this thing.

Edlebrock Performer:
http://store.summitracing.com/partde...art=EDL%2D2104

Weiand Action Plus:
http://store.summitracing.com/partde...art=WND%2D8024

Holley:
http://www.holley.com/HiOctn/ProdLin...SM/300-67.html

Holley is $163.95. and Summit carries it, they just don’t have it on their website.

So they are all within $10 of each other and seem to be virtually the same. Am I missing something one of you can pick up on? Anyone have any of these who can give some input.

I'm bolting a Holley 650 Spreadbore (PN: R84021) onto this intake.

Thanks for your input!

 

Is there a reason your not looking at the performer RPM or the RPM air gap? because either of those two are by far better for performence than the performer. I really dont like any of those manifolds.

 

I have 87 and up heads, and I can't find a Performer RPN or an RPM Air Gap to fit them.

 

All you have to do is elongate the center bolt holes on the intake and it will work. Those bolt hole angles are the only difference.

 

Yeah its really easy to do with a drill or a dremel I did it when i ran the performer RPM with my tbi engine. Its well worth the gains your going to see over those other manifolds.

 

I have access to a drill press... How large and where exactly should I drill?

 

Ok... so I'm looking at this option...

http://store.summitracing.com/partde...art=EDL%2D7104

This is what you guys think I should look at?

 

I have the Holley Street Dominator 300-70. It replaced an Edelbrock RPM and it was a difference. They were both great manifolds, but I got more power from mid to up top with the -70 Dominator.

The bottom end was a little more torquey with the RPM.

Depends on what you want.

Tom

 

Professional Products manifolds will fit thoses heads with the angled center intake bolts.

http://www.professional-products.com/