1969 z/28 full floating connecting rods - Fact or Fiction

[red69]

Have to throw my two cents worth in here. In 1972 I purchased a 1969 Z-28 with 50,000 miles on it. The motor needed freshinging so I pulled it down, the pistons had full floating pins. In 1975 I purchased my second 1969 Z-28 with 66,000 miles on it. When it was pulled down for rebuild it also had full floating pins. I assumed with all I had read about 1969 Z-28's being produced with full floating pins, that these two cars came from the factory so equiped. But it is possible that both these engines were torn down before I bought the cars and full floating piston pins installed. Could have been a full foating pin legend conspirousy.
          Pat

[jdv69z]

I pulled out my 34 year old copy of "How to Hot Rod Small Block Chevy" published in 1972, and "viola", it lists the part no.'s for 69 302 engine's full floating pistons; not only standard 4" bore, but .010, .020, and .030 over as well. Aslo listed is the spirolox retainer no. This conspiracy goes way back. May be related to Kennedy assasination??

Jimmy V

[asm69]

Thank you for your response.

If you have the opportunity could you please post the part numbers for the standard size piston as well as the oversize pistons.
I would like to cross reference those numbers. As I said before. I prefer to believe that the 69 z came with full floating
pins during factory production.

Thanks again. Please post those numbers as soon as possible.

[asm69]

While I continue my research into this matter I would like those of you who have 1969 z/28's and who have pulled their
engines out and who also have found that the bottom of the connecting rods had the cast letter 'O' and who also
have found that the connecting rods had pressed pins to post to this thread and say so.

[jdv69z]

From "How to Hot Rod Small Block Chevys", authors Fisher and Waar published 1972:

3946841 - Connecting Rod 1969, floating pin
3946876 - Piston & Pin Assembly 302 Std, 1969, forged, floating pin
3946878 - Piston & Pin Assembly 302 .001 OS, 1969, forged, floating pin
3946880 - Piston & Pin Assembly 302 .020 OS, 1969 forged, floating pin
3946882 - Piston & Pin Assembly 302 .030 OS, 1969 forged, floating pin
3946848 - Retainer, piston pin, Spirolox for floating pins, 0.042 inch thick

Jimmy V

[Classicgary]

my copy of Chevrolet Power copywrite 1980, has the same numbers for the std. 302 and the .030 302 forged pistons.