I have a 1968 350 short block. I want to put vortec or edelbrock e-tec aluminum heads on it.

What am i going to need besides the heads and intake? More specifically, summit offers a kit - NAL-GMP3287-1 - that converts an LT-1 (92-95) to an LT-4.

I want a roller cam when all said an done, and know i need to add or do something to the block for this to work. Any specifics would be greatly appreciated.

thanks!

chris