1969 440 4bbl, how good a motor?

Hey:

Been on the hunt for a big block for a while.

Came across a low mile standard bore carb to pan 69 440 out of a GTX. Dude says it runs good.

Is this going to have decent compression and what-not? Would the pistons be a mile down in the hole? Are the heads on this thing any good?

Thanks!

Steve