Bucket Seat Tracks

I bought a pair of 73 model bucket seats for my 72 Scamp. Classic Industries shows 70-72 bucket seat tracks I can buy new but they say they would require modification to fit the 73 seat. Does anyone know about how hard it would be to modify my 73 seats to fit the 72 seat tracks? I think it would be easier to modify the tracks to fit the seat, rather then modify the existing tracks on the seat. They are rather rusty and one side is way off from the floor, seems like the 73 floors would had an extra hump close to the transmission tunnel where the inner seat track mounts. Thanks in advance.