moleary

You can get a surplus 6.2L engine for about $400 (I bought 2 for $125 each) - you might consider upgrading to a 6.5L n/a instead. Swap time on the engine is about 10 hours and you'll need a lift with a long reach.

This is all assuming that a 6.2L from a military HMMWV will drop into an H1. I just finished a restoration on my HMMWV, so this is pretty current pricing.