I'll put a Sun Valley trans in before having mine rebuilt. They have a very good reputation. There isn't much reason to screw around unless you need cheap. Cheap can turn into expensive and a time hog.

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85SD 240K & stopped counting painted, putting bac together. 84SD 180,000. sold to a neighbor and member here but I forget his handle. The 84 is much improved from when I had it. 85TD beginning to repair to DD status. Lots of stuff to do.