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403/455 swap
  • bigrigford
    Posts: 2Hitchhiker
    I have a 79 Trans Am and replaced the 403 with a 455 Olds engine. I found that the fuel pump on the 455 does not have a return fuel line post on it. Only posts for line from tank and line to engine. What should I do with return fuel line?
  • Oldcar_MechanicOldcar_Mechanic
    Posts: 1,786Platinum Member
    1) Is the fuel pump from the 403 the same? If so, you could swap them.



    2) Plug it
  • bigrigford
    Posts: 2Hitchhiker
    I believe I could swap the fuel pumps, they look the same excet for the return fuel line.



    Thanks
  • Oldcar_MechanicOldcar_Mechanic
    Posts: 1,786Platinum Member
    Make sure that the lever is the correct size.



    Ron