1977-81 Camaro Z-28 members could you help me with some information about the rag joint and end of the steering shaft. It seems that in 1977 1/2 the rag joints diameter decreased to about 2 5/8 inch diameter along with the end of steering shaft. Up until then the rag joints or steering couplers were 3 1/4 inch diameter. Am I correct. I am hoping someone will measure their parts and confirm it. Thanks John.