How to identify High Hump vs Low Hump

[Captkaos]

Not sure what you have, here are some references with descriptions:

low hump.  1978 2wd, 3/4 ton:


1983 K5 4x4


1980 2wd 4-Speed high hump


73 K-20 Auto, 4X4:


1980 c-10 1/2 low hump:


1981 low-hump (2wd, 1/2-ton)


1991 Crew Cab 2WD 1T High Hump


1986 K-30 Automatic Hugh Hump


1984 K5 4x4 Automatic


1986 K30 CUCV M1028


1983 K30 dually 4speed 4x4