Hi Arturo, This type of fuel pump uses a fuel tank strap for attachment, and they are sold separately.

I think the idea is to use the old type retainer ring. It will not attach like the original with studs and nuts. I was not able to make it work properly. Maybe you need to convert to the old style fuel pump from a 1997 Camaro/Firebird as well. This may also require modifying the steel return line to tee into the pressure line if you have an LS1 engine. Since ethanol fuel mixtures are very corrosive when the car sits for a while it is better to try and convert to a 1999 or later fuel tank. This will require a fuel pump, fuel lines and evap canister for a 1999-2002 Camaro or Firebird. This is the best solution I have found for a 1998 Camaro since they are one year only and all the used gas tanks appear to be corroded and/or loosing the interior coating. You can search online for instructions. Staff (Grace G.) wrote that fuel tank straps hold the tank in. While this is correct it did not answer your question about how to install the fuel pump into the top of the tank.

Hi Stan, thank you for reaching out! Upon checking, this will not fit. We do not have a fuel tank available for that model. Have a good one!