Slant won't start!!?!!?!?

I finally got the valiant in the garage today and found thr following:

No thermostat
Leaking water pump
Some unknown wire where the thermostat goes
Did a compression test with the push gauge and got about 10 psi in cylinders 2, 5, and 6. 20 psi in cyl 1 and 50 psi in 3 and 4. I think it's safe to assume its blown. I'll be working on putting in some new stuff I got: water pump, thermostat, hoses, radiator and head gasket set.

What's the possibility of the head being cracked?