Bronze distributor drive

Hello all im putting together my 440 race engine. With a solid roller cam. My question is my distributor drive gear got chewed up while i was turning the shortblock by hand. Everything spun and felt smooth. I held the drive down by hand while rotating engine and i could see little chunks of bonze coming off. The oil pump is not installed (no that im typing this that could have something to do with it) so where do i do from here shim the gear? new parts? Take cam out? Thanks