The engineers at Performance Online have expanded their classic truck product line by offering the 1st rear mount aluminum fuel tank for 1973-87 Chevy andGMC C10, C15 and C20 trucks. These tanks are designed to fit between the frame rail and rearward of the axle on 1973-87 Chevy, GMC trucks. By eliminating the hazardous side saddle tank, you get cleaner body lines and added safety. Made of heavy gauge aluminum, these tanks offer a light weight design and are fully baffled.