I am new to the mopar life and dove right in with a 73 challenger. I need rear quarters, right rear frame rail and a gas tank. The gas tank and frame rail is an immediate need. I was wondering what the best company to order these pieces through is. AMD pieces seem to be the best, so I am going to go with them. I found a company called "columbia parts company" online that has everything I need. I was just wondering if anyone has dealt with them before. Any input will be helpful. thanks

You will not be disappointed with the AMD rear frame rails. I used them on my '73 and they fit great. I needed both replaced.

For the gas tank, doesn't really matter where you buy from - ebay, rockauto.com, your local napa. Almost everyone is selling the made in Canada spectra premium tanks. I've bought two of them and they're great tanks, fit/look perfect. There are supposedly some cheapie china made junk tanks out there you want to stay away from.