Greetings. The old Nissan is running! Thanks for all the help. So my 74 Scout 11 has a Nissan with a 3 speed. It's 2 wheel drive. If I wanted to drop in a 4 speed, what fits? Would it have to be a 2 wd tranny, or does a 4 wd fit? Still new at this. Any difference between gas or diesel tranny?