PiFBA has been done for RPI1 so, it should work, but I can't test it as I don't own a RPI1.
It works fine on RPI0. have a look into Recalbox bios/FBA folder or roms/FBA folder for a file called fba_029671_od_release_10_working_roms.dat (or in google if you don't find it into Recalbox)and use it in clrmamepro with a recent FBneo romset. It's the way I've build mine.
I can't say more.
FBneo romset 0.2.97.44 works fine on RPI3B, I use it.