Head Selection
I was also planning on running stock rockers since I have a set with the trunion upgrade already and I'm not gonna have much money left in the engine budget after head/cam.
Engine is going to look like this:
6.0 block
Ls6 intake
headers and no cats
didn't put them on 6liters. They opened the bore to 4.065 to unshroud the
2.16 in. valve and 376 inches helps port speed on a 260+ cc volume runner.
Your 408 will no doubt be a beast w/ these heads but I'd still suggest a
nice cnc'd cathedral port for the OP.

