If you hit something hard enough to break the strut loose from its bedding, the strut and shaft are likely bent. At least have the shaft checked for runout at a machine shop. No more than 0.003" runout is standard. Use the shaft through the shaft log with the nut on it and new strut to get it as close as you can. Turn the shaft by hand with the strut bolts slightly loose to get as close as you can. When the shaft is easiest to turn, its lined up. Then tighten the strut bolts. Be sure the new strut is bedded with something like 4200 or 5200. Then you can install the coupler and align the motor to the shaft.
1992 Supra Mariah - Red
PCM 351HO 285hp - PCM 1.23:1 Transmission
OJ XMP 4 Blade CNC 13x15.5RH
"People do weird things to boats" -Unknown