A few other things I've thought of you may want to know:
Your car probably has a 4" bolt pattern on the wheels, which is an a-body anomaly.. most Mopars and Fords run a 4 1/2" bolt pattern. A lot of people swap the parts out for a newer a-body which has the 'big bolt pattern', which increases your choice of wheels greatly.
You'll see small bolt pattern referred to as 'SBP' and big pattern referred to as 'BBP' on here.
You can download a factory service manual for your car here:
MyMopar - Mopar Forums & Information - Service Manuals
You'll see that referred to as 'FSM' on here.
If you have the fender tag, usually mounted on the drivers side fender under the hood, you can decode it here:
MyMopar - Mopar Forums & Information - 1969-1974 Mopar Fender Tag Decoder
Read the instructions carefully. This will tell you how close your car is to factory original.
For the gas gauge issue, post that question in the 'Fuel and Air Systems' forum on this site.
Welcome to the club, man!
