I have a 82 30ft PA 454 / 4 barrel Dual exhaust if I keep my foot out of it I will get around 8 miles per gallon and that is with my toad in tow.
Not sure what type genie you have but I have a Onan 6.5 Gen-Set I had to replace the fuel pump $35.00 and I did it in about 15 minutes. I also added a filter being the MH is of age.
I am not positive but the stairs motor is a electric car window motor but someone else will know for sure.
We like pictures did you get any? Plus there are a lot of us that like older Motorhomes. Now a days they all look the same to me.
Good luck and tell us what you get.
1982 Pace Arrow 30ft.
KarKaddy SS, Toad:99 Concours
Lilly and Rubie Our 4 legged Kids & Tim & Joe