Hi Guy's
Been around these trucks a long time.
Bought my first C20 Cheyenne in 74.
Ordered a 77 K30 when they first arrived, with everything GM had Still have it.
It was truck number 14 off the line.
Then a 6.2 84 K30 which was quickly repowered with a 6BTA 5.9
Also added a 86 M1028A2...