There's no reason to go the trouble of unbolting the cab. You have to lower the angle of the transmission t-case anyway. Unbolting the cab mounting on a 32 year old truck is something I would NOT do to pull or re-install the engine.
But... I guess whatever works for you.
Gnarls.
It takes maybe 15 minutes to remove the bumper and 3 cab mounts, it isn't any trouble at all, and never had an issue with lifting the cab on a truck, as I replace the body mounts on every truck I restore, the last one was 30yrs old.
Had I not swapped a trans from a stock Toyota into one with a 2" body lift on the same day, I would probably think the same way, but having done so, I found the extra 2" of space made it a lot easier and less frustrating. After that swap I tried lifting one side of the cab when I did a clutch, then an engine removal/installation, and continue to do it for clutches or trans removal, but for engines I find removing the engine and trans/t-case the easiest, since it makes mating them back together much easier.
