[dsraven]

do you have an engine hoist? a couple of pieces of 2x6 a bit longer than the cab is wide, spaced apart so the engine lift arm fits between and the spacer,the spacers on each end can be a bit taller than the beam is so the cab can't slip off one end. the center spacers hang below and have a hole drilled through for the attachment point to the engine lift beam. slip the works through the cab door opening and lift. once the lift takes some of the weight of the cab you can see if it will balance.if not then let it down and adjust the positioning till it lifts level and balanced. then mark the cab and the lift beam where the balance point is with some tape or whatever. then you will always know where the beam needs to be. it's a one man operation.