90 PACE ARROW HELP!!!

You could be on a 1989 chassis. "89 had carbs, "90s had fuel injector via a Throttle body. They sort of look like carbs.
Please post your vin number.
Can you tell if it is a Chev or Ford chassis?

Also I still have a carburetor. A throttle body injection will probably have a different configuration.

What chassis?
GM chassis,
Brian is correct as the pump is in the tank and the filter is on the right frame rail back by the rear axle.
There is a strap to hold the filter in place, 1/2 inch socket with extension.
%/8 and 11/16 wrenches to remove lines.

With my 1990 Georgie Boy I have a pump in the tank and one on the engine and the fuel filter is on the side of the frame rail passengers side part of the way back from the engine. It's a GM Chassis