restoring 1987 holaday Rambler

I did not think it had a pump in the tank, until I too the tank off as there was a fuel problem, It has a holly Carb on the 454 Chevy motor right now. When I first got it, it had a pump on the motor, and a dinky pump about halve way up the line, and a spread boar rodjestor carb. Not sure how it ever really worked at all when I took it apart and saw what was there. The generator works off of the return line on mine, and has a dinky pump by the unit.
They went to fuel injection the year after mine I am guessing. I have a guy I know from Bartow FL. that has one that was mad about six months after min he says. it has fuel injection