1991 360, what am I likely to find?

Hey All:

Just agreed to buy a 71K mile 1991 360 out of a D250.

What kind of compression would this thing have? I understand its possible that it will have the '308' heads and be hydraulic roller.

Any other pitfalls? Think it would make half decent horsepower with a cam, intake manifold and headers? Supposedly it leaks down real well...

Thanks for any help

Steve