I am going through the misery now.
Yeah I noticed your other thread. I was looking to see if I kept any of the Chevelle info I had. If I find it I'll pm it over to you.
Hurst made custom shifters for many GM lines including the Chevrolet models Camaro, Chevelle, but also for Olds, and Pontiac over the years. I would say if you are trying to use a Hurst OEM shifter that was made for a Chevelle on a Saginaw in a Camaro you are going to need some custom made rods and linkage.
You can try rods and levers from a Competition Plus retail shifter for a Saginaw trans but change out the bushings for steel ones - Hurst Speed Pac or also known as the Pit Pac bushings. You will most likely need to use the U clamp tail mounting method if the Hurst won't bolt to the standard Muncie shifter plate on the Saginaw. If your head isn't spinning yet you might also just want to scrap it all and buy a new comp plus retail with linkage for a Sag and call it done. At least that has a 99.9% chance of working the first time, and shifting every time. Dropped shifts and constant re-setting are signs that the shifter and linkage are mis-matched. Nothing like being in traffic stuck in neutral (better then fourth).