[Mr70]

I agree with you somewhat up to this point.."I would think, all the drive shafts were the same for all manual trans Camino's??<u> Why would an L-78 be any different?</u>

I have found most plants alternated driveshaft color codes for some reason.
One Example:Any 1970 L-78/Manual trans Chevelle hardtop or convert. built at the Kansas plant before 11/1/69 shows a Blue-Yellow stripe designation.
Around 11/2/69 they went to Pink-Orange for the exact same equipped vehicles.
The rearend ratio,bodystyle-(meaning Convert.or H/Top),or wheels chosen look as though they had nothing to do with it.The engines horsepower &amp; transmission-(Manual vs. Auto.),and a time frame were what each assembly plant was looking at when these colors were chosen,but I do not see an obvious percise pattern.
Sometimes they even went back to what they used early in production,only to be reused again near the end of production.And even shared a color code over to a different engine horespower,that they just stopped using on another engines HP previous..i.e. 396/350HP color code now being used on 396/375HP,once it was discontinued on that previous engine.
Bear in mind this is only one plant and one vehicle designation.Imagine all the possiblities within 7 different assembly plants &amp; time frames and engine/trans. combinations.

You need to find a 1969 Elcamino built at the same plant as yours,with the same engine HP &amp; trans. as yours,and as close to your build date as possible for a proper guideline.