1961 Corvette & Chevrolet "P" code differential case for positraction optioned cars, casting number 3743833 with a foundry date code J-4-0 and no assembly date code, this case has the large, thin P indicating that it was cast at the Flint foundry, that is correct for C1 Corvettes (thick P cases were not installed in Corvettes), both caps are included and are correct to the case, no damage or repairs, very nice used condition and ready to build, flat rate shipping only to the lower 48 states, thank you for looking and please check out the other items in our eBay store.