Can't help with the length. Maybe a little food for thought. Why not change to adjustable pushrods. You will get a more precise adjustment plus you won't have to open your rocker boxes if you need cam or lifter replacement.
Uncle Joe; r.ex = purple = 2nd longest
r. int = blue = shortest
f. int = yellow = next to shortest
f. ex = green = longest
Doncha hate it when someone answers a question with a question?
R.Joe; Thanks for not taking my reply in the negative. I was supposed to put one of the Smiley's there, but I was in "quick reply" and smileys are not avail. so here
Breeze