a marine elec pump yes, for a test anything will work, as long as its a 3-4psi pump..
My 74 searay had milky oil, just not enough rtv in the intake corners.. re sealed mine and been running fine ever since. Gas in crank case - hmmm, leaking past worn rings.
buy a android optical camera off fleabay for 10 bucks, stick it down plug holes.
Rent a compression gauge from autozone - not sure if you can pressure test a ford block without blocking off the elbows.. i seem to have been told GM elbows seal the water off, where ford have weep holes that slowly enter the exhaust pipes (which is why a pressure test will fail).. but u need to ask some experts here about that.
I had a motorbike sit for 1 yr with fuel in on and crank filled with gas. drained / refilled - been going like a champ for 5 yrs.
best u can do is try get it running (well). flush cank case, pour in cheap oil and see what happens after a few hot runs.