Keep on driving with your RA gears. Are they treated? If I where to get RA gears, I would have them SHOT PEENED before going in.
Don't go RWD just yet, you're just looking to break something else. Drive until it breaks.
I'm lucky my "spare/tempory" tranny ('93 L AWD 5spd) survived the dyno day. I put down 270whp/wtrq on the MUSTANG dyno, BUT it later broke that night while doing pulls. Three weeks later it finally locked out of gear so I'm waiting on a 6spd.