741 case 3.91 gears wanted

Have a guy on another board with a cool 33 Plymouth looking for a new set of 391 gears for a 741 case.

I don't think they are available, so thought I would put it out here.

Does anyone have a good 391 ring & pinion for a 741 case for sale?

he has a whine that he wants to correct. Not sure if he has factory set or aftermarket in there now

my suggestion to him was to get a 742 or 489 case, but he isn't wanting to spend the money for a complete new 3rd member and has an overdrive trans and likes the 391 gear

please send me a PM