I can e-mail you some info I have a bout driveshaft angle's, everything I have is in books and it won't let me post pictures in messages.

In need of Driveshaft expertise! I had the frame stretched on my Kenworth T2000. I had 8 feet added to the wheel base and installed a 26' box on the chassis behind the sleeper. A place out in Gurnee, Il area did the frame stretch and driveshaft work. I am questioning the way they did the drive shafts and wanted your opinion. I know have 3 drive shafts that are about 5' long going from the transmission to the front differential. The first one was always there, but then added 2 more to make up for the length added. I haven't measured the angles of them but the first 2 drive shafts are angling down and the last one angles up just a bit (approximately 5 degrees). All the information I can find has all the drive shafts angling down. I feel a slight vibration now in the floor and shifter when under heavy load and acceleration. When I take my foot off the accelerator pedal it stops immediately. Do you see a problem with this drive shaft setup? Any thoughts?
Thanks,
Steve