Milling for compression

I don't understand why you say this, Rusty. It would definitely change the angle at which the pushrods operate; that should be obvious. However, I am not saying it would change the pushrod angle too much for proper operation.
LOL!! Then the valvtrain geometry must be f**kin' DESTROYED on the originally designed 170 slanty, since the deck height is OVER 1.6" SHORTER than the 225, the pushrods
are nearly perfectly straight-on in every direction on a slanty. Please don't post uninformed speculations, You're doing the OP a disservice, this is how people end up chasing
mice in their heads.............................