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Former Member
Send PMLeavenworth, KS - USA
Joined: 1/24/2007
Posts: 426
Vette(s): MM Red 1971 T-top,LS5,4-speed, black leather C5 seats, Hooker sidepipes.
Previous: 64 Coupe, 65 Roadster L76 / N14
Just an interesting (to me at least) bit of info that I just learned. BTW, I could use some help from any member who owns a numbers book.
I just cleaned up my driveshaft as part of my "let's see what other trouble I can get into" tour. 
Under all that rust, I found the part number, which appeared to be acid etched along the length of the shaft in inch-high numbers. Kinda cool.
Noted that the yokes on the shaft are stamped SPICER USA, so my choice of HD, lubed-for-life, SPICER U-joints as replacements was a good one! I call that I-N-S-U-R-A-N-C-E.
Of course the numbers are now covered by primer and Eastwood cast iron paint. Sure looks nice!!!!! I recorded the numbers for posterity.
Here's where I need the help. Could someone tell me if my driveshaft is OEM??? The number is 3921675. The car is a '71.
The "tour" continues, probably into August. Hate to miss the cruzin weather, but Penny needed the resto work.
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Duncanville, TX - USA
Joined: 11/8/2003
Posts: 22720
Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/
Am-Fm/map light National/Regional/Chapter NCRS "Top Flight"
#2-1985 Bright Red/Carmine Cp.L-98/auto
Member: NCRS, NCRS Texas, Corvette Legends of Texas
Check out the pic of the driveshaft in my '74...this is the way the number looked originally. The numbers are 5/8" tall. The number you listed sounds like a GM number, so I'd say it is prolly the correct shaft.....
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Click for linkJoel Adams
C3VR Lifetime Member #56 
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"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"
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