3.91 or 4.10 gear

I have 2 sets of 3.91 ring and pinions for 741 case,would sell a set,also 3.55's 2 sets would sell one set,I am looking for a set of 3.73 or 3.91's in 742 case so am open to trades or sell 65 bucs plus shpg per set..shpg would be about 18 bucs in usa