My 57 Chev pickup project has a 700 r4 and a ford 8.8 rear. I need to tackle the driveshaft. I have a driveshaft from an extended Astro and I have the one from the Ranger truck that donated the 8.8 rear. Both have a 3 1/2"od tube but the Astro driveshaft tube tapers down at both ends. I figured on machining off the Rangers rear yoke and cutting the Astro's driveshaft in the 3 1/2" portion to weld the rear yoke on but the darn things about 6" too short. I'm assuming the tube should be one piece so I can't join these two shafts. To make a long story short I now need a donor driveshaft with a 700 r4 front yoke and a long enough 3 1/2" tube section to cut and weld the ford yoke on at the rear. Just wondering about what vehicles to check at the wreckers. It'll be a challenge to find one because if they've been out for a while the sleeve part will be rusted and if still under the vehicle it'll likely be bent from the wrecker's forklift. My 700 r4 is the older version with fewer splines.