I just put a set of LS6 heads on my LS1 and i also just heard that the LS6 valves are longer thn LS1 valves. My pushrods are 7.400", will they be ok or do i need shorter pushrods? I did notice a little more preload than normal when i tightened the rocker arms. I haven't started the car yet until i find out what to do first.

 

I've got stock LS6 heads and 7.400 pushrods. I have slight ticking, so either 7.400 or 7.425 would've worked for me. The very small amount of length difference in the valves wasn't enough to offset anything.

 

No worries here. Turn it on!

Jim Hall III

 

Thanks guys I will have the motor and transmission back in this weekend.