I think I see where you got mixed up, the 3.55 listing is for an R10. That would be a Corvair 95.
jorb, I really only checked Trucks, and skipped the El Camino since its driveline is Passenger and does not interchange.
Olememphis51, is there any chance you could post a few pics of the rear you have? It's possible it may not be a Chevrolet axle.
Longbox, I can get some pics but have to figure out how to post them. Am kind of surprised this might not be a chevy rear.
