Great point about the 4WD gearing, didn't even think about that. Hopefully I won't damage the R1s too quickly, as the tires on the Ford dry rotted long before wearing out (tractor came with the property). We'll see what happens.
LD1, I'm already planning on a Fit-Rite TNT, that's why I'm adding the rear remotes. Not quite confident enough in my welding abilities to attempt my own.
Do you guys keep a spare tire, at least a front one, around? Is this unheard of?