Because to maintain the proper geometry your rocker are adjuster should have 2-3 threads exposed below the rocker arm. If you cut the heads the old pushrods should be to long unless there was to much of the adjuster showing before the milling?
Ok --Got it -for what ever reason if you don't have adjustment its pushrods..
I had plenty and usaully everything is a fight so i will knock on a fender!
thanks i am here to learn!!!!
