46RH aka 518 Questions

Any reason not to go with a 46RH?
I have a line on a 1990 46RH out of a Ram Van with the converter that I'm going to look at tomorrow to make sure its the lock up version.

Besides having to butcher the tunnel, cut the drive shaft and make a trans mount, is there anything I need to be aware of?

I'm just trying to make sure I'm not missing something glaring.
Should bolt directly to my 91 360.

Any issues with starters?