I own 2 - 65 Buick Skylark convertables. Both had Wildcat 310's (300) in them. Both have the same 10 bolt rear end. I'm trying to find out what size they are and the stock ratio that they came with. I want to beef up one with a limitted slip. Can anyone tell me what I have and what I can do to make them more solid. Also can someone let me know which company makes a good limitted slip setup for them.