Axle shim recommendations

[scottbrummett]

I have approx 8 inch lift on an 88 Samurai,SPOA and OME springs. 
I just purchased new 31x10.50 15 Interco Super Swampers.
I'm looking for pinion angle shim recommendations to reduce wear on the drive shaft during road use.
What degree and manufacturer?  Recommendations please.
Thanks
Scott