Ok basically the balancer is held onto the crankshaft via a bolt but its also a pressure fit meaning the shaft is slightly bigger then the hole in the balancer
Heres the shaft without the pulley
Heres one with it on
To put the Balancer on from the S/C engine you will need the Crank bolt for the s/c engine zzp has them they are like 9 bucks
you line up the pulley with the keyway on the shaft and thread the bolt in and impact comes in handy here
heres a pic with the bolt in place
Gpona.com has the gm service repair online if you sign up there you can get all the gp repair info you need
