Muncie 4 speed transmission main case casting number 3925661, this is a desirable No VIN Counter Case sold at the parts counter or installed under warranty in 1973, this was just professional bushed in the front and rear of the case then cleaned, some marks remain around the front bushing where someone previously tried to peen and tighten the counter shaft hole, finish remains natural aluminum (no paint), this is an excellent and very hard case to find, thanks for looking and please check out the other items in our eBay store.