Recommend Lubelocker gasket, the BEST! Used on my 3 mustangs, including my road race car, zero leaks, no issues. Link for reference.
https://www.summitracing.com/search...skets/axle-model/ford-8-8-in/brand/lubelocker
https://www.summitracing.com/search...skets/axle-model/ford-8-8-in/brand/lubelocker