WHII Wheel Alignment Specs?

[BuickChief]

Can someone please let me know how I can get, or perhaps email me, the F & R Wheel Alignment Specs for a WHII Statesman? Are they the same as the WK? It still chews rear tyres even though it has the (standard) modified suspension. I know that pulling a caravan is hard on the rear tyres.
Thank you in advance.