I agree with the upgrade in motor, one with full oil presure, 235, 250. There is a 1965 250 with a fourspeed tranny in our local thrifty nickel for $250. It runs and doesn't smoke. If I hadn't just bought a 72 4 speed tranny I would have opted for this setup, and I have a 235 in my truck already. And another 235 motor that doesn't smoke for $150.00. Can't beat those prices. I know you are far away and it would cost you $500 to ship a motor that far. If you have time search your local thrift papers or junk yards.
Dan Dilts
Woodland Park, CO