hey everyone i have got a 5k with 4k head on it and a solid cam, i have chev lifters and a12 pushrods but they seem too long does anyone know what length pushrods are needed? thanks for any help

hey everyone i have got a 5k with 4k head on it and a solid cam, i have chev lifters and a12 pushrods but they seem too long does anyone know what length pushrods are needed? thanks for any help

 

Hey, I used 4k pushrods. 186mm a12 156mm ball and cup used with the adjustable rocker gear, I believe. You may have a dished piston 4k head which is 6mm shorter than the flat top head.

Edited June 19, 201115 yr by GJM85

hmm arnt the 4k pushrods heaps longer than a12 ones?

Oh yeah, hang on. I just cocked that up big time. I've had to refer back to my build thread.

 

I used holden red motor lifters, a12 pushrods @ 156mm and the 4k adjustable rocker gear.