Hi rjpjr,
I would probably consult our measuring guide if you are unsure:
https://www.pelicanparts.com/catalog/shopcart/TOOL/POR_TOOL_QJGUI1-detail.htm
I know people on the forums have fit
964s and 718s and
996 + 997 but you may want to give us a call and see what our sales team knows. 310-626-8765!