What is happening is:
The diff is twisting under power is causing it to nose up (almost hit the floor), thats about 4-5" of twist. It has hit the bump stop mounted to the floor on occasions. Nothing holds the diff in but the U-bolts on the springs.
I can angle the diff down without issues but I can't put more than 1-3.5 degrees on it. In terms of mm thats less than 10mm. Otherwise I'll be destroying even more unis. That should be more than enough anyway.
What I need to happen is stop leaf spring flex/twist which I wished pinion angle would help with but it won't.
I've got lowering blocks too which makes if fun to set pinion angles
Any ideas on suspension places that are willing to have a play with it would be good too.
I had Keysborough diffs set the pinion angle on the last chassis. All they did was cut down my lowering blocks on an angle which set the pinion angle but raised the car back to very close stock height. I don't want to go there again as I didn't buy the parts to lower it, so someone can wreck my lowering blocks and raise it again.
Any idea's on known setups?