Thanks, I found that NAPA has a SAE 90 GL-1 mineral gear oil that I will use in the tranny. For the differential, I plan to use Sta-lube SAE 85W90 Multi-purpose Hyphoid gear oil, API/GL-4.
1946 Chevy 3600 Pickup 1948 Chevy Sport Coupe Country Club 1963 Corvair Monza Spyder Convertible