? on 7 1/4 to 8 3/4 rear end
Ok so where can I buy this spacer ring??? anyone
Since nobody knowledgable answered, I relate what little I know. There are two fit issues.
1. The torque converter must match the crankshaft snout. Early torque converters have a smaller snout than later cranks. Not sure of the cut-off year (early 70's?). Might have been with the switch from forged to cast cranks. I don't know where to buy the spacer ring. Search FABO to find several posts.
2. The input shaft splines on the transmission must match the splines on the torque converter. If you put a later torque converter in an older transmission, it will seem to fit, but will just spin uselessly without turning the input clutch. Many posts on this "what the heck" issue. I understand you can change the input shaft in an older tranny, but requires taking the transmission half apart. If so, replace clutch plates (cheap, ~$2 ea for standard plates), at least measure your steel plates, and install new rubber. A "banner kit" includes these (no steels). Might be better to install a later rebuilt tranny, as others suggest. Should fit fine since '66 started the lever shift housing, which continued forever (even late model transverse Torqueflites). Of course, shipping costs are a b***, so if resourceful, modifying yours could be best.