moparraceman
Well-Known Member
whats the lenght of drive shaft , center to center on yokes, 360 motor, 904 trans, 83/4 rear end ?
Spend a few minutes and get the measurements and call a place like Strange Engineering. I went by the specs off the internet minus an 1/8” based on my inexperience with measuring driveshaft slip yoke protrusion and had a local shop rebuild my driveshaft to that for a few hundred bucks… but I have +2“ leaf springs and now 6 degree shims correcting pinion angles. It turns out I was wrong on my length… Strange Engineering is now building a driveshaft that is 3/8” longer than what I originally had made (1/4” longer than factory spec). Oh, and this error on my part is costing well over $500 to make right using all new parts, cause I am chasing a driveline vibration above 50 mph… there are way too many factors to guess a number… including what’s the correct slip yoke protrusion. I ended up at 1.25” with my first attempt, which industry standard is 3/4” to 1” max… don’t guess, measure what you have…
Ya… local shop was an hour away and they did a great job and did exactly what I wanted… however… I was wrong… and that’s where we are now, and chasing a driveline vibration when everything is new/rebuilt from flex plate to rear tire… and the vibration was there before I started this project. So this time I just opted to include no part of the old driveshaft or slip yoke, and start fresh with correct measurements for correct length, and see what that got me.My local shop only charged $120 to lengthen my driveshaft when I switched to a manual. I'd recommend a small local shop for a better price. (I know, too late now)