Can you settle an argument?

[Jeff Lee]

On the subject of Z-28's...if a smaller diameter main journal is better for less frictional loss and therefore performance, why did Chevrolet increase the size in 1968? And it seems the "large journal" is a selling point (same with the rod journals). Is the "small journal" SBC that weak?

[Dana Fitzpatrick]

Originally Posted by FINESPLINE

Hi Dana, this is where it gets interesting. I have three 1969 camaros. camaro #1 is a X33D80 Z/28 09D #2 is a X77D80 Z/28 02C and #3 no X number with narrow spoiler (68)flat hood Z/28 10C. All with factory spoilers-first 2 are norwood cars ----so I give Up !

Does the 02C car say D80 on the cowl tag? If it does I stand corrected, and not the first time! Also, does it have the short spoiler ?

[Chuck Norton]

Originally Posted by FINESPLINE

I have three 1969 camaros. camaro #1 is a X33D80 Z/28 09D #2 is a X77D80 Z/28 02C and #3 no X number with narrow spoiler (68)flat hood Z/28 10C. All with factory spoilers-first 2 are norwood cars ----so I give Up !

Since the designation "D80" to identify cars equipped with the spoiler option was not used until midway through the model year, there are a couple of possible explanations. The most likely is that the "09D" body date (fourth week of September) is a very late car. 1969 Camaros were produced until about the first week of November, 1969, due to the late release of the 1970 models. A spoiler-equipped, 09D car built in September, 1969 would have the D80 code on the body tag. An 09D car built in September 1968 should not have the D80 code.

[rayfin]

SO there was a 69 RS z28 but not as SS Z28?

[Jeff Lee]

RS is a body trim package and could be added to a base Camaro or SS Camaro or Z-28 Camaro.
SS is a drive train package and you got a 350 or 396. So you could have an RS body trim package as an option to the SS drive train package.
But you can't mix drive train packages. RS Z-28 yes. SS Z-28 No.
Make sense?