Ole Skool, MY6's were used from 81-86 in some pick-ups & vans as I understand it. Ratios are 3.09, 1.67, 1.00, & 0.73. IF you get serious looking for one, here's two tips: Be sure the case (Alum.) has a Chevy bolt pattern on the front face AND as with any O.D. trans, engine to trans. alignment is critical. Many of these were no done right either at the factory or in later conversions. Consequently, it is very common upon dis-assembly to find the rear bore in the input shaft galled out, the caged roller bearing set there junk, AND the nose of the mainshaft junk. One can be seen in my pic's link below. Inspect carefully before purchase. Then, align it carefully & its a great gearbox. Same trans was used behind big block Mopars. Some good info avail., do a online search. Hope this helps - Doug
