these are worked LT1 heads, they made 420rwhp on a base tune, bolt ons and a GM847 cam.

heads will come with:
7/16 studs
comp 977 springs
titanium retainers
locks
guideplates
7.9" comp pushrods
crane 11522 solid lifters
stock valves
timing set and chain

lookin for 1400obo.