Bob< when I build a turbo for a customer, supplying a new waste gate, I mount and line it up before shipping. It's a bit of a pain otherwise. If you are using the to4e compressor housing, then you will need to install the stock elbow on the turbine housing, if you have one. Next, attach the adjusting rod to the elbow and let it hang, line up the stock brackett on the 3 bolt retainer that secures the compressor housing to the backing plate. At that point I breakout my welder and tack the actuator to the retainer. Once secure, I remove the actuator with retainer, weld it up and drill the middle hole, thats it, your done! Now being the engineer that you are, I'm sure you can figure it out. By the way, say Hi to Noi for me, best of health and luck for the New Year.
one more thing,, if you still have your PT51 turbo, the compressor housings may bethe same, either duplicate the wastegate config from that wastegate or just install it on the new turbo.