I have a recently rebuilt 350 in my 91 K2500 with flat top pistons and a mild cam. It has the stock TBI heads and cast iron intake manifold. I am thinking of upgrading the heads and intake manifold, but I don't know which combination is the best to use. Anyone ever use the Edelbrock preformer intake and aluminum heads? What about the World S/R torquers? Any help is appreciated.
The stock heads are very restrictive, get different ones or port and polish them. I put the edelbrock intake and some ported and polished stock heads and I noticed a difference, but not like a supercharger or anything. You would see a bigger difference in ET at the track if you were to drag it. By the way if interested I have that intake used for sale. Along with some other parts.