Okay - spoke with another mechanical ‘guru’ that reinforced what you said Joe: Leave the motor where it is, because of the "comfortable clearance" to the firewall and the towers working perfectly - and simply move the automatic’s cross member forward.
(Same-same, long time.)
He advised me to talk to HB Transmission (the guy that’s going to adjust everything after the fire off and exhaust system installation), and he can put another (longer) yoke going into the back of the TH350 to make up the engagement distance.
Now the only other foreseeable problem might be the emergency brake assembly and the cables - that also mount on the cross member, but that shouldn’t be anything terrifying.
Onward and upward.
Mac.