R151F, forward shift RF1A and Marlin Clutch, flywheel.
This would be great for your first gen Martin, if the guy wasn't so proud of it! The R151F's low first is nice, but not one grand nice when you can get 3 nice W56 trannys instead and stack transfer cases.
'91 Toyota Pickup
'09 Kawasaki KLR650
'12 Gunnar Rockhound 29
“Anyone who believes in indefinite growth in anything physical, on a physically finite planet, is either mad or an economist.” -- Kenneth E. Boulding