I bought a 69' mustang tank for my 59', I found that Rock Auto had all the dimensions and the best price. Measure between your rear frame rails, you may need to consider moving a crossmember. There are several ways to add a filler neck, I plan on using a Chevelle style tag bracket to hide the filler neck behind.
Many owners are using the 70'-72' K5 blazer tank in their AD's, the filler neck is on the rear drivers side.
