1980 4spd will be the SM465. The adapter will have mounting surfaces that both resemble a figure 8. Round style mounting adapters didn't start till they switched from 10 spline output to 32 spline output and went to the aluminum 208 T-case in 1982. Those 10 spline units used a sleeve to connect the transmission output to the transfer case input. The splines were notorious for wearing so bad lots of them stripped completely out. The sleeves are rather cheap. Be sure to put a new sleeve in if you have more than a tiny amount of slop in the splines.
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Today's Featured Article - Earthmaster Project Progress Just a little update on my Earthmaster......it's back from the dead! I pulled the head, and soaked the stuck valves with mystery oil overnight, re-installed the head, and bingo, the compression returned. But alas, my carb foiled me again, it would fire a second then flood out. After numerous dead ends for a replacement carb, I went to work fixing mine.I soldered new floats on the float arm, they came from an old motorcycle carb, replaced the packing on the throttle shaft with o-rings, cut new ga
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