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I'm going to be ordering a custom aluminum driveshaft in the coming week or so and I just need to verify with you guys. I measured my old rusted steel one and it was 52" center to center. In the CJ pony parts catalog its listed at 52" as well. However a trusted friend measured his and he says his is 51". I don't want to be off an inch lol. PS The car has a 9" rear with a toploader.

"BOSS 331"
73 fastback
331ci stroker
wide-ratio toploader
power discs front & rear
9" trak-lok axle w/ 3.70:1 gears
To ensure there is ABSOLUTELY no confusion, I would contact the driveshaft manufacturer, give them ALL the specifications and asked them how they want the measurements taken.


Do the RIGHT thing.
Driveshafts are measured Center of u-joint to center of u-joint. If you measure from the side of the u-joint to the same side of the opposite u-joint it makes it easier.

Jeff T.

Low buck, touring style, '73 Convertible "rolling restoration", 351c, 2v heads with a shave and a haircut, Performer intake, Holley 650(ish), roller rockers, screw in studs, guideplates, stainless valves, Duraspark / Motorsports MSD, T-5 conversion. 1-1/8" front, 3/4" rear swaybars KYB shocks and some home brewed subframe connectors. Future plans; JGC steering box, Cobra brakes and... paint, interior, etc.

When I die I want to die like grandpa, peacefully in my sleep... not screaming, like his passenger.

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