my rear end is in the shop getting re geared and when i get it back i want to put a bigger shim under it...the one i got with the lift springs is just to small and the pinion angle is horrible....however if i put a bigger shim on the spring im afraid that the pin that the perches sit on will be to short.....what am i suppossed to do....i will eventually down the road get a cv driveshaft but i need a solution to hold me over until then.....