Posted by 86Diablo:
"edit: also, i have seen several vortec equiped trucks at the local junkyard, are these the same as the performance heads and could i use them on my sb?"

96-up 350 RPO L31 truck.

Here's the skinny on 'em.....
http://www.sallee-chevrolet.com/Cyli...ds/Vortec.html