I understand that '38 and '40 frames are 'similar', but are the crossmembers, transmission mount brackets, etc., all the same? Will a '40 drivetrain bolt straight into a '38 chassis, and the body just drop straight on top?
I believe you will have to rework some fender pan bolt holes and the front crossmember to accept the 40 forked brace. Drive train will work fine. There will be some slight modification required to use the 40 pedal bracket and linkage.
Thanks guys. JimTN, on the pedals, is the main difference in the clutch pedal and linkage? I think I have some '39 pedals and bracket, if they're easier to use, although would that then cause problems with the column shift linkages?