Yeah as James said, the 4t80e won't clear it. And I already proved nothing short of a full built 4t65HD will handle the load produced in the rear engine setup.
Except of course a full out race built chassis which would make it possible to use two mild built 4t65-hd. Right now my full body 4400lbs twin engine is a pig and I need a pig of a trans to go with it lol