I'll have none of this gip........
The idea is to use a V-Twin Drewfus, no not one of those expensive pump motors but maybe a Honda Firestorm or something similar like a TL....but anyway it'll be run transverse which means we only need about 600mm (2ft imperialists) from the back of the diff to the firewall . Having the closed tailshaft style diff means there is a spline which will be easy to adapt to run a short chain to the secondary that means we've got motor/box/clutch in one package, then we've got cable brakes, we can use the hand controls off the bike, even the twist throttle mechanism as the pivot for a pedal. There's a free biscuit for anyone who gets what I'm talking about there.............
I just went out and ran a tape over a few things.....then I sat against the wall and measured how much leg-room I thought I could get away with....
Now, from the pointy end it's just over 800mm to the small bulkhead, that's enough for the rear spring,rear end and motor assembly.
From the small bulkhead to the nose is 1500 or so which means there's enough room for the spring, front end and steering ( 250mm front to back) and enough room for me to sit with my legs flat (1200mm).....
Sitting legs flat feels weird and takes away your ability to brace too but bending your knees leaves little room for a steering wheel so that is a compromise that will have to be made I reckon........It's going to be a better fit than I thought....
I am not in deNile which is Am-a-zon all things considered but I may live to Ruhr the day that I didn't read the Seines and moderate my Rio Grande plans, I must have been O High-Oh .