Ended up cutting a larger hold in the floor than I had originally anticipated..
the T18 is a HUGE transmission and I didn’t want to lower the crossmember, so I had to make room up above.
I’m still within the footprint of the stock tunnel cover, but it will need to be modified or a custom one made.
The recipe that worked for my trans mount was the "Z" bracket from a Scout II and a standard Jeep/Chevy transmission mount.
crossmember is in factory location, with factory bracing, no extra holes drilled..
I couldn’t use the Scout mounting pucks due to the fact that the D300 and oil pan is bigger than the stock D20. This is the key reason why the hole in the floor got bigger.
Got the pedal bracket mocked up and holes for the hydraulic systems drilled.
going to have to shorten, bend, or both the pedal arms due to the slope of the tub floor.
Both Masters fit nicely in the engine compartment.. have to bring the hood home to check clearances.