I haven't done that job in-frame, but others here have.... maybe they can help. Meanwhile, I think you have to either remove the front axles and differential - or - unbolt the engine mounts and raise the engine about an inch or so.

Good luck,
Frank

'89 [color:"white"]G-Raider[color:"white"] [color:"black"]Supercharged 3.0L, MegaSquirt 2, lockup A/T, 2.5" exhaust, 172k, Cibie H4s/Oscar SCs, Hella Micro DE fogs, Cobra CB, Superwinch hubs, LSD rear/Aussie Locker front, Bilsteins, Lifeline AGM, Rust-Oleum