It sounds like what you need is a "Load Leveler" to attach to your engine lift.
If you're not sure what that is go to EBay for an illustration,they have tons listed, and then go to NAPA or PEP BOYS, etc. and buy one. They are not that expensive ~ $50 or less. Regarding your truck; you will find
lifting out the engine and/or trans a lot easier if you remove the truck hood.
------------------
Drew
'55 Chevy