Im looking at aluminum 345 cc intake runner heads with 119++cc chambers for a 500" blower motor with about 8 pds boost and 8:1 static compression running on 91 pump gas. My question is what heads to buy? Merlin, Edelbrock, Brodix, Dart, Procomp Canfield? Price is an object so I'm leaning toward the World Merlin III's or Canfields. Does anybody know about these ? Others? Thanks.

Add one more - AFR, we have had good results with AFR's.

I used Dart when I put a Whipple on my HP500EFI this winter. works great, running 6 lbs. Cometic head gaskets. The heads came with valves and springs ready to run. New coating on the aluminum too.

I run the Edelbrocks. I had them flowed and out of the box they are not that good, but with a little work on the exhaust side and 8 lbs of boost my 509's make 775 hp at 5700!!

Procomp VS Canfield???

Myself and a couple friends actually bought 6 sets of the procomp heads recently. You would be suprised how well they flowed out of the box. I will look for the numbers. We had them flowed by 2 different people.

I know Baker Engineering prefers Brodix.

I would stay away from the Pro Comp's. I had a rep. trying to sell me on them. We gave in and put a set on a N/A 572. They came fully assembled. After one run, we pulled them off and the spring cup had pushed through into the intake runner!!!! They make decent power and flow okay but the build quality is crap.

Brodix on mine.

havin good luck with my Edelbrock performer RPMs, they are ported and polished though.