Technical 1934 Ford chassis - 5 speed ??

I just picked up a GM NV3500 as an option for the 34 Ford Victoria project. Shifter distance back from engine mounting face is 23", S10 T5 is 18". Anyone use this transmission, looking more for input on fitting in chassis, etc, rather than durability comments. Also, does the 5" further back than the T5 shifter affect seating?
I don't have to use this transmission, but the pricing and overdrive is attractive.