Ignore the arm chair experts . These same guys usually recomend small 600cfm carbs etc etc.
Air flow makes power, carbs heads exhaust headers and system and the intake manifold , have to flow air to make power.
if you choke it with a small carb or small exhaust or a lazy porting effort etc you will get
crappy results. MAKE IT BREATHE!!! Make the engine process a lot of air.
The lowly performer manifold is going to limit the performance too.
The RPM manifold is way better in every respect.
Get your car together and post the performance results.
if you did a decent job of porting the heads it will work well.
Most people make the mistake of not porting the stock head enough.
Mostly because they buy into the typical misinformation on this subject.
Like just do a pocket port job or just do the first and last inch you can reach etc.
You need to get serious with the die grinder. The meat and potatoes is deep in the port.
A small effort gets you a small result.
This goes for any of the stock SBC heads including the good old fuelies.
One of the other often overlooked stock heads that work very well with full home brewed porting
is the "083" iron castings found on 350 L98 TPI motors. Likes 2.02x 1.60's and generous porting.
Another "diamond in the rough". For a cost conscience performance build up.
Last edited by F-BIRD'88; 09-17-2012 at 02:56 PM.