3.73 gears for 742 case

Anyone have a used but good condition 3.73 gear ratio ring and pinion set for 8 3/4 742 case? I am currently running 3.23 in my 440 six pack scamp, 2500-2800 stall converter comp extreme high energy .525 / .525 lift cam. Runs good but just not the beast I think it could be with lower ratio gears. I'd like to get a used set in case I'm not happy with it, then try another if need be. Mostly a street car, plan to take it to the track once it's dialed in.
Thanks