I picked up a dana 44 with the flat top knuckles on both sides for my new cross over steering arms. My question is can I leave both sides at the ten degree angle or whatever it is from the factory as long as I cut the steering arms to correct for the angle at the tie rod and steering rod points? I just think it would be easier to level the little bit at the end of the steering arm opposed having to mill level and tap the flat tops. Cause no matter what I do I can't mill the drivers side cause the studs are already in at the angle from the original Chevy steering. I hope this all makes sense. Thanks

Doesn't matter--you don't have to mill the steering arms flat to compensate for the angle, although it doesn't hurt to do so. You should mill the knuckles to match each other, regardless of what you do to the arms.