Just pulling the 3rd member out of my 67SS 396ci, TH400. Has apx. 85,000 miles on it. The diff currently sports a 3:08 and single track axel. I am considering purchasing 3:55 gears and limited slip posi. My question is which brand is the best ? I have heard from an employee at a local speed shop that Richmond Gears tend to whine. He also said he has seen alot of Auburn posi's break, and recommends Eaton. Another fella said Eaton posi's are prone to chattering in the corners. Now, I am totally confused. Maybe I should just replace bearings and seals on the peg-leg I have and not re-invent the wheel. What in terms of driveability will I gain or lose ? What are popular brands of ring/pinion and posi's that don't have hidden quirks ? Thanks in advance for your help. Slo.