Just a word of caution re. long drive shafts, be sure to have a professional balance the piece. A buddy of mine made a long driveshaft for his 3/4 ton pickup, it came apart on a downhill and launched the truck over the side. He survived but the rig was totaled.
Drove a car with a badly balance driveshaft
once.....never again!
Most driveshaft shops I've dealt with balance them as a matter of course.
