which cylinder heads to use?

[benoit454]

I hear nothing but good things on vortec heads, but I also hear tbi are good for low end torque.

[spudz]

Originally Posted by benoit454

I hear nothing but good things on vortec heads, but I also hear tbi are good for low end torque.

Vortec heads are decent for stock heads but they dont allow for much lift without some machine work to the spring seats and valve guide area. stock is safe between 0.420 and 0.430 inch. But can be corrected by some work to the spring seat and valve guide area. These machining operations will produce enough clearance to allow between 0.525- and 0.550-inch valve lift before running into valvespring coil-bind. Something else to think about is he has to have a vortec conversion intake manifold too.