I have a Holley Contender intake on a mostly stock 350. It came with the car and I don't know how old it is. It's a 300-36 which is the same model no. as the current high rise strip dominator. But that doesn't mean it's exactly the same. I know that Holley and Edelbrock went to a smaller cross section high efficiency runner in the '90s. Anybody have any idea when that happened, and what I should look for to find out what I've got? I know that the newer manifolds have 1.99" x 1.14 inch ports, but I'd like to see if there's any way to tell without having to pull the manifold just to measure the ports.
Basically, I'm going to swap to better heads. I'm thinking AFR 180s. I'm trying to decide if my manifold is going to be the new chokepoint or if it can flow all the intake charge the heads can handle.
I'm thinking of just port matching the runners and installing a lifter valley cover to keep the manifold cooler and seeing if I can get most of the benefits of the newer air gap type intakes.
If I do need/want to get a new manifold, does anyone know where I can get independent info on the weiand stealth air strike? There are plenty of articles and dyno tests about the Performer RPM air gap, but I'm not sure if that's because it's the best or if Edelbrock just has better PR
and more advertising dollars.
Thanks for any info.