After all that time and work...

So some time ago when I still had the 318 I had a driveline vibration beginning at about 70 that was annoying but not bad enough to keep it off the road.
We were in CA with the Dart sitting around with relatives and I wanted to go do something else for awhile, so I got some recommendations from a few local places like Napa for a driveline balancing service.

Cool, found a highly recommended guy at a local race shop that would let me pull it in the parking lot and balance it right then.
Well it felt better, but still not smooth like I expected.
(Figures a highly recommended race shop couldn't get it totally balanced, right?)

Well when I replaced the 904 with an A500OD I had to shorten the driveline 4 inches.
I cut the front yoke off pretty clean with a 4 inch cutoff wheel and took 4 inches off the shaft with a metal grade chop saw and welded it all back up with the mig welder thinking I could get it real close and rebalance it again.
OMG, I hit it right on the nose and it was smooth as silk (something a pro shop couldn't apparently do for $150 bucks.)

Jump forward to a few weeks ago.
I was on I40 over by Kingman AZ cruising along around 90 like it was nothing and into the headlights comes a complete tire cap from a semi laying almost dead center in the lane.
I knew instantly I was not going to be able to totally miss it without risking loosing control of the car at 90mph, so all I could do was hit it where I choose.
It went under the car just inside the left tire and came out the back flying 15-20 feet in the air with a feel and noises that just makes you cringe.

It hit my damn driveline, and I have a vibration again. :D
I can live with it for now since it's only at 80-90 then it smooth's out again above that, but CRAP! :D