Sm465 4 speed granny low, with a 203, 205 or dana 300. The sm465 bolts right up to the 4.3, the 4.3 shares the same pattern as a 350. So any tranny that came with the 350 will bolt right up. It's basically a 350 with 2 less cylinders. 21 spline will not hold up, 23 spline might. AA makes an adapter to run a r150f, you could do 23 spline duals. I wouldn't want an auto. Not good for snow IMO.
