I am looking for 3:42 gears or complete rear differential to go into my 69 wildcat. I'm not sure but think 68-69 riviera gs is my only option. I don't want a 10-12 bolt setup as I have a disc brakes for my stock rear end and it's a posi unit already. Any leads would be appreciated, and there's no rush here but trying to locate parts over the winter. Thanks in advance, Gord