GM Truck/Suburban Online Forum

Anyone know what the best Suburban/ GM truck forum is? I am considering trading my FJ 80 land cruiser for an eighth generation Burb but want to do some research on best years - it was produced from 1973-1991 - and possible engine slash transmission swaps. I am fortunate, as a land cruiser owner, to have an excellent forum online (ih8mud) and am looking for something similar. A lot of what I have seen thus far is full of mindless dribble and poor grammar.

Thanks in advance-