I'm considering the possibility of swapping the original torque tube rear end in my '51 3100 for another torque tube rear end from a passanger car from the same era with better gearing. Does anybody have any suggestions of which years/models I should look for?

'51 Chevy 1/2 ton w/'62 261, HEI, offy, fentons, dual carter/webbers, t-5 & 12 bolt posi