The fully sychroed model that started being built in 1966 is a very sought after unit. I use these to make 4 speed OD saginaws. Guy's love them in cruisers.
Speaking of such, Tlowe, got any pics of these conversions. I do not think I have ever seen one & I am pretty sure some guys here have not either.
That would be the smarter way to go. You could afford to misshift this 4 speed & still beat that bad gear gap 3 spd & still have OD.!
MBHD