When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Muncie has 7 bolts in the side cover
Borg Warner ST10 has 9 bolts
Mike
Also, a Muncie will have "General Motors Corp." cast into the side of the main case, while the Super T-10 has "W.G. DIV." (for Warner Gear Division) cast into the case.
Your car should have a Muncie, as that's what came in 71 Corvettes. The Super T-10 wasn't used until 75.