[67L78conv]

As soon ass I dig the papers out I will let you know what I have. The lists are master accounting lists for all options both standard RPO and COPO options. In the case of the COPO options it tells me what vehicles the option was available on and the price but does not necessarily give the production totals for example it does not show the COPO 427 Camaro totals. If the rear end option has an RPO code like H05 even if it says COPO in the description then it will give me a total in 98% of the cases. If the option like G84 for special order gear ratio covers multiples like 4.10, 4.56 and 4.88 then it only shows the gross total and not a per gear total. These are broken down across each model and grand totals for all models.

Based on what I have seen from Camaro L78 production it would not surprise me at all if that many L78s were 3.55/3.31, 3.07 seems less common but I admit my overall data is not sufficient to draw any strong conclusion on it. A rough rating for overall gear ratio popularity when ordered would be most common to least 3.55, 3.73, 3.31, 4.10, 3.07, 4.56, 2.73, 4.88 when ordering the L78 package. A lot of people seem to have taken what was standard for the gear ratios on the engines for all first gens unless they knew what they were ordering or the dealer nudged them in another direction. Again this is more opinion than fact based on limited data and word of mouth from original owners.