Milling big block heads?

moper said

You'd do better to just have a set of 516 closed chambers done up. Because by the time you're doen welding you'll have to re-do all the guides and valve job too.
Stroker, milling or pushrod length doesnt affect the geometry on a shaft rocker system. Only the valve job or rocker manufacturing does.

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I beg to differ. Unless he spends big bucks on custom length pushrods, and uses adjustable valve gear, it certainly will have an effect. Without either, his engine will likely not even run, and might even cause some engine damage. Also, not to mention that the rocker arms would probably fall right off the valve tip at max lift. Even with adjustable rockers, he would run out of threads on the adjuster on the rockers or come REAL close. Rule of thumb there is only one or two threads exposed. He will need both adjustable valve gear and custom length pushrods to accomplish it correctly. Couple all that with the expense of milling everything and it's pretty senseless. Just my opinion of course.