Fuel sending units

I know this is probably long settled but what I am finding is that 2421493 is superseded by 3621615 which is superseded by 4051004. So technically you could use the 242 in place of the 362. THAT being said...if you haven't used your 242 and it is NOS would you like to sell it? I am restoring my Dads 67 Dart and want to keep it as original as I can.