Lightly lube o.d. of bushing & bore in crank, tap in place making sure it's going in straight. I use an old input shaft & a brass hammer.
As for flywheel & clutch, if the floor pan can come out it make it makes things easier. Use a small amount of thread sealant (gm pipe sealant w/ Teflon 12346004 or equl) on the flywheel to crankshaft bolts as they are not blind holes. An old input shaft is the best alignment tool imho. Tighten all bolts small amount at a time. A couple of 1/2" threaded stud makes transmission alignment easier. Another trick is to adjust the clutch to the point where the release bearing is snug, helps keep bearing from getting knocked of fork during trans install.
