Richmond Gears tend to be noisier than some of the other brands. Gears made by a company called US Gear work very well in all of the Moser 12 bolts that I sell, and they should work very well in your 10 bolt. Keep in mind that with your car having a six speed tranny, you may end up walking home with a broken rear. Especially if you do holeshots, regardless is you are on street tires or not. I have seen totally stock F Bodys break the rear. Having said that, I'd go with 4:10's for a six speed and have fun with it until it breaks, and pay to have someone install the gears, as it is not a real easy job.
I don't recommend throwing additional money into the 10 bolt to try to get it to survive, such as better axles, rear girdle cover, etc. I've seen waay too many of them end up in my scrap pile! Bob