I really would like to do the 440source heads rather than the Eddy's, but, I'd have to send them to someone for cleanup/inspection before bolt on. Which everyone seems to recommend.

The eddy's you don't. So, toss up. If there were a really reliable person here in KC I could trust with the 440source's, I'd probably go with them.

The cam, t-chain, headers I already have. I made a mistake on the cam, Its a comp XE274.

The 440 isn't apart yet, but I'm assuming the pistons are about .085 or so in the hole on a stock LP 70-440.