I was hoping someone would reply that had actually done this. I am sure it would work. I did use a R or Z pump gear set in a 206 diesel oil pump once. (Metal had gone through the pump and chipped the old gears.)
Just be sure to get your gear end clearance right.
My only problem that time was the drive gear I.D. had to be honed a bit to slide up on the diesel shaft as it was .002-.003 larger than the other shaft for some reason.