[joedoh]

I like to get the cab on and the motor in to do the front suspension, having the weight on the frame makes it easier to compress the springs, and without a front clip its super easy to replace everything (except the brake line under the engine, if you need to replace that do it with the engine out).

as long as the flat of the floor is parallel to the flat of the top of the frame, you shouldnt need to measure a bunch. the frame is largely flat on top right in the middle, around where the factory splice is and aft, forward it dips a bit.

you should be able to tuck the motor way back with the tall mounts, and get a nice big radiator too.

looking good!