Yet another gear oil question

Has anybody actually tried the Valvoline Synchromesh oil? I'm reviving a 2009 451 that was towed behind an RV in gear, fubaring the engine, clutch and transmission. I got the car for for free and have rounded up the parts to make it work. Once it runs, it will be used at low speed for non-essential but fun short trips, like tens to hundreds of miles a year. I'd like to find a gearbox oil good enough for that and readily available at local suppliers. I'm very skeptical that use of anything other than BOT 328 will actually cause mass death and destruction, but I'm curious whether any members have tried the easy cheap locally available options. My local NAPA evidently stocks the Synchromesh at a low cost. Does anybody know of any reason I shouldn't try it?