since we don't have a tow rig section i am asking this here , can someone tell me how i can get more flex or angle out of my front drive shaft on my pickup? it is a 1980 c30 chevy i converted to 4x4 using all factory parts from a 86 k30 chevy, i threw in some 2'' springs in the front and now the drive shaft will bind up at full droop. it has plenty of extra length but the cv joint at the transfer  case is where the problem is. can i clearance the cv out without any problems or do i have to buy a custom one? here is a pic of what I'm talking about  (not my pic)

It has been years since I messed with this, but as I recall, and more memory will fade in later as I think about it, the goal is to measure the axle pinion angle and the transfer case pinion angle and they should add up to 180* with deflections in opposite directions. We did it using the yokes, a magnetic torpedo level and and angle finder on the level. Add (Or subtract, depending on which end or which way you are going) 90* from that measurement. The only way to fix these is tapered shims between the axle and leaf springs on the axle end of the shaft.   

Been a long time, and my memory could be off, so maybe there's a better answer out there.

Ray

I think something else may be out of whack. I am using an 89 setup with 4" springs without getting close to binding. Is the rear of the T-case very low, increasing the angle?

That could be, mine is a 3/4 ton. I say grind it as much as you need. How hard do you use it? My worst case would be towing someone in the sand. If mine breaks, I put it in 2wd unlock the hubs and drive it out carefully leaving the poor guy behind. I rarely "NEED" 4wd. If you are hard core spend the money otherwise grind it and keep an eye on it. If you are really worried buy a spare.

Call a professional, driveline vibration over time can cause pretty major issues. I have had a couple drivelines build by this guy, all the pre-runner and off-road shops around OC use him too.

OC Driveline
Ray
714-993-6494

Located in Placentia off the 57 at Orangethorpe.