The way I did it was to pass a length of 4x4 through the cab (my doors were off), put holes near either end of the 4x4 for a length of chain to pass through, then lift the cab up by the chain with a come-a-long attached to the rafters.
1948 Chevy 1/2-Ton "Tuesdays with Morris" In the Legacy Gallery Find it - Fix it - Drive it