| Crusing in the Passing Lane Joined: Jun 2011 Posts: 5,096 | It is always best to have a new driveshaft made, it is not worth dealing with questionable driveshaft histories, unless one is able to verify fitups and history. Driveshafts can only be shortened, not lethened.
Ed
'37 GMC T-18 w/ DD 4-53T, RTO-610, 6231 aux., '95 GMC running gear, full disc brakes, power steering, 22.5 wheels and tires. '47 GMC 1 ton w/ 302, NP-540, 4wd, full width Blazer front axle. '54 GMC 630 w/ 503 gasser, 5 speed, ex fire truck, shortened WB 4', install 8' bed. '55 GMC 370 w/270, 420 4 speed, grain, dump bed truck from ND. Works OK.
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