Flywheel decoding

Skip FIx

Skip FIx

Well Known Member
Moving stuff from storage space to shop I built I was looking at my factory flywheels. One I think is my 64's original cast iron(I switched to a Hayes aluminum I still have too). The other I got with a 80 Camaro 4 speed conversion for my Camaro(now a Pontiac motor TH400 combination(.

One is a 3714463 I have one source saying it is a 348-409. It has a date code of K78 though which I do not understand. if a Julian why the letter, if letter is month an 8 does not match 63 or 64.

The other is a 3973456N date code D10 80 which would fit the Camaro setup.
 
Skip FIx

Skip FIx

Well Known Member
I didn't think that far back! How close dating were flywheels to car build dates? l Guess it could be, maybe swapped along the tie in the car or GM had stockpiled them .

I was not original owner on the car. Just the last real owner. Sold the body while in college s my folks moved out of state and not storage, and never got paid for it. Guy swore I came and took it from his garage. Still have the title. Check with DMV about 20 years ago and never registered again.
 
Skip FIx

Skip FIx

Well Known Member
Thinking back I did buy a brand new 409 distributor from the dealer in 1970. My Pontiac 1972 HO service replacement aluminum intake I bought in 79 has a '75 casting date so I guess 68 could still be possible as I bought the car in 70.
 
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