ok... so im new to the whole drivetrain thing. i have a six inch lift and i want to put some zero rates under my sub to get 7 inches of lift and the move the axles forward. so i want to know about all the driveshafts. this is also my dd. so vibration is not wanted at all. so what are c.v. driveshafts? double jointed driveshafts? etc.?which are the best for dd? which are the cheapest? where to get them? any info would be great... thanks.