8 1/4 A Body Rear-end Complete Sure Grip

Trying this again. Looking for a complete rear-end for my 63 Valiant. 8 1/4, sure grip. would prefer something in the low 3's so i can maintain decent gas mileage. Looking for something complete with SBP that will bolt right in. Don't want to have to move perches. Live in Northern California. Would prefer something that has been rebuilt and is ready to go, but still interested in something that might need work. Thanks a million.