You need a clutch lineup shaft or you can make one with a proper sized broom stick handle, when you install the clutch to make sure it's centered so the trans will slide right in.
I trust you replaced the bushing in the crankshaft as part of your overhaul. Either the sintered bronze original style (I prefer it) or the new roller bearing style. This is a MUST.
The clutch fork should be pressing on the top and bottom of the throwout brg to be in the right spot.
LIGHTLY wipe a SMALL bit of grease on the trans shaft where the throw out brg rides. Also on the ball. Grease the shaft ends, and if there's a grease nipple on the shaft, pump some grease into it.
Don't forget the rubber boot that goes over the fork and covers the opening protecting it from dust.
You MAY need an adjustable push rod if the stock one doesn't work length wise.
Make sure you put the TH.BRG, in with the big side against the clutch. Sounds stupid but I've seen them put in backwards before on assembly.
