Hard to say, too many variables to apply a one size fits all measurement. Best thing is fashion an adjustable push rod and use that to find the correct length. I won't go into detail of setting up the valve train geometry because its been a while and i only watched, didn't actually do it. But there are several YouTube vids that go in detail on the subject. Basically your set the rocker for the correct geometry and adjust the push rod. Roll the engine over a couple times and recheck. If everything is good, lock it down and remove, then just measure the length and order what ya need. Not saying someone running the same set couldn't tell ya, but variances in deck height, cylinder head surface, rocker pedastel height etc can stack up between engine to engine. Better to tailor for your specific engine combo, but just my opinion, not the law. Hope this helps
