The bigger valves will keep the motor breathing on up in the RPM's, but they sometimes (atleast with very large sizes) will cause a loss in velocity and sometimes a reduction in low end power. Just plug it into desktop dyno if you have time and see how it affects it. I havent dealt with either head, only complaint I've ever heard on the Vortec's is that a cam over .550 lift cant be used with the stock springs. (of course, how many of us really have that in our 4wd). If you want Desktop Dyno send me a pm.
Alright, the dotted lines represent the Torquer heads. They have the same specs all across the board, only difference is the heads. Its a 388, with 9.5:1 compression, small tube headers, 600CFM carb, dual plane manifold, and the RV cam I run in my 355.
Whats the compression, use of the engine, etc.? That goes a LONG ways towards which is a better head. Vortecs are fairly cheap to use on a carbed setup, $150 will net you an edelbrock performer for vortecs, but once you step up to a bigger cam, if you have to deal with emissions, etc., they start to cost you more money, that typically doesn't happen with aftermarket heads.
dyeager and I have hashed this out many times before and there is NO comparison!! Hands Down Torquers are the better head!!! BUT for a little more I would go with a pro topline head that "IF looked around for can be had for not to much more!! They are very nice out of the box and the castings are a much better comparison, side by side they are better than all but Brodix and AFR out of the box and I've seen LOT'S of them!
But let's just look at the comparison your asking about,
1.castings are better for Torquer!
2.Valves are bigger and BETTER!
3.Castings flow better out of the box!
4.Springs are better, keepers and guides are better!
5.screw in rocker studs!
6.no manifold needed, no self aligning rockers needed, BETTER resale value so if your dead set on Vortec's then nothing we say can change your mind but LOOK at them side by side and it's VERY obvious which is a better quality investment and h.p. producer! /forums/images/graemlins/eek.gif