Figured that I would revive this thread a little. I have the SM465/NP203/D300 in my CJ7. I'm moving forward on my tube buggy build and came home with two transmissions yesterday. An SM420 with a 7.06:1 first gear AND a light duty Chevy NV4500. I'm not sure just yet whether it has the 5.61:1 first gear, or the '93/'94 lower first gear ratio of 6.34:1, but either way, I will likely use this transmission in the tube buggy. UNLESS I find a Mercedes OM617 turbo diesel to swap into my CJ7. In that case, I may use the NV4500 in the CJ7, with the 4:1 Dana 300.