Hi there. I found this site while looking for a southern K2500. Since I'm several trucks into the GMT400 style, I figured it would be a good fit. I frequent the 6.5 forums, mostly.
Past GMT400s have been:
1990 K3500 454
1990 K1500 4.3, then 5.7
1989 K3500 454
1995 K2500 6.5 TD/4L80E...