Milling big block heads?

tooslow said
I always read this about the custom pushrods(why???)
when you mill heads say .100

I bought a set of 440Source heads and milled them .100 to reduce the CC volume to increase my compression.(had dif opinions on wether this was a good idea-the end result was i picked up 33hp w a larger cam)

I used the old mech pushrods and adjusted the lash with my adjustable valve gear. no big deal*Crane Roller rockers

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?