How much HP and what do you think it will run.

One of the members here didn't dyno his 572 before putting it in his car, and it looks like a lousy balance job was done (or, not done) by the shortblock builder, and the member had to yank it out and send it back.....and wait. Missed the drag week it was built for, lost his entry and room reservations, basically ruined his day.
In my opinion, and considering how much you have in it already, scrape the nickels together and dyno it.