i have run that B&M holeshot converter in my charger for many miles. [well, before i parked the car around 2006 or so] i bought it in the very early 1970's, and it is a good street converter in my opinion behind a 383. if it means anything, my charger has 3.91's for a rear gear.
Back in the 70’s Chrysler sold pallets full of 10-3/4” converters to B & M, painted and sold as Holeshots. Not sure which converter they were - my guess they were the 340 model.
