You'll be hard-pressed to gain anything over the 300-36 with any manifold. There's a reason they don't make those Torker manifolds anymore, they weren't that good in the first place.

 

Jefferson, you own a street car with and engine that more than likely will never see past 6,500. I would recommend a dual plane manifold, like Edelbrocks Air Gap Manifold. Most single plane manifolds are designed to operate in the upper RPM band, and street driven cars mostly see the lower RPM band spectrum. This is where a dual plane is benifical. There is probably no manifold that can out perform the Air Gap manifold from 1,500 - 6,500 rpms, bar none.

 

This is where a dual plane is benifical. There is probably no manifold that can out perform the Air Gap manifold from 1,500 - 6,500 rpms, bar none.

X2

Jefferson, if you have not seen this test of several intake manifolds, check it out. Very informative...Jack

[ame="http://www.youtube.com/watch?v=i2DvnoHWagk"]YouTube - Edelbrock Intake Manifold Dyno Test :: Single Vs Dual + Air-Gap Vs R[/ame]

 

That was THE most informative movie I have ever watched about intake manifolds. Thank you very much for posting.
Now the question is, would I benifit from milling my divider in the 300-36?

 

Now the question is, would I benifit from milling my divider in the 300-36?

If I were you, I would try the spacer first. Try flipping your air cleaner lid up-side-down to grab an extra inch of space unless it is a flat lid rather than a peaked one. Old trick I learned from a dyno-tune guy. If the spacer makes a noticeable difference and you can afford to possibly ruin a great 300-36, give it a try. Otherwise I would leave that good manifold just the way it came from the factory. Jack

 

Looks like dual plane is the way to go

 

My 2 cents is a Weiand Stealth Air Strike. Same as a Performer RPM Air Gap but it's RPM range takes it a couple hundred RPM higher. I have one and love it.

 

I would leave it alone. Anything to the intake you will not notice on the street. Any gains you may get wouldn't be any different than making the car lighter by driving with 1/4 tank of gas over a full tank.

 

Do not waste any more time thinking about this. The 300-36 is an excellent intake and is every bit as good as the Performer RPM or any other dual plane, besides, you already have it. Bolt it on just the way it is and have fun. Any gains to be had by trick modifications and spacers will not even be noticable in a street application.