Some of the Camaro OEM trans levers incorporated molded on rubber bushings on the forward levers and some didn't have the rubber. I have seen them both ways on original cars
Firebird used the same lever and used the molded on rubber on the forward and Reverse levers
Camaro reverse lever does not have the rubber
The 69 Camaro AIM does not show the rubber on the trans levers but does show it on the shifter levers
The AIM shows two washers #5 P washer and #9 SPR washer
the spring washer is not used with the rubber
the spring washer was used to keep the rod tight and reduce noise and would not be needed with the rubber
the levers with no rubber , show the spring washer and plain washer and cotter pin
the levers with rubber just show the plain washer
the levers with rubber would be better to use just a flat washer as not to damage the rubber
The Hurst E clips can damage the rubber also
http://www.camaros.org/images/shifter/69AIM_M20_3.jpg