A few questions

Yes I understand, you lose .012 so order that on what you want.

I am looking into kits right now and I am going to talk to the guy that builds the motors at the shop to see what he believes I should get.

Performance wise, what type of crank and cam should I get?

Its a percentage loss, not a general number like .012, it could be as much as .025 and is greater as the lift/profile increases.

Yes, deffinately talk to a builder and mention the 59* lifter angle and compensating for it some.