Specs for my SB

sorry about the lack of info

8 3/4 with 3:91 in it now but have 3:55 laying around
4spd
street and track use, but street manners aren't necessary as the car will be driven very little. maybe 2k miles a year if that. its a full interior 67 dart with 17" wheels. If i have to run avgas in it i will, i have a 100LL pump a mile from my house, pump gas is not required.