what year dod they stop using the rockwell t-case?

[BurnoutNova]

I looked at a "71" gmc K1500 truck for sale today... well the title and owner says its a 71 gmc anyway. The truck had drum brakes, a CS vin beginning and the t-case shifter wa on the left of the 4 speed shifter... so I'm thinking it must be a 69- or older frame and running gear.

I thought they quit using the rockwell t-case in 69, and some 69's got the np205??? are there any pro's to having a rockwell?

thanks