im still looking for the full time 4-wheel drive shift indicator. it was used on three different t-cases from 1969-79. it forms an arrow similar to the regular steering column pointer/indicator. it fastened under the shifter knob by a collar (held by a set screw) and ran down the stick over the boot to point to gears (hi, lo loc, etc. on the aluminum plate) held under the boot retainer. this may have been an option/accessorey i dont know. chevy put on some and not on others. why they had the gear plate and not the pointer, i dont know. pics of the pointer can be seen in chilton's blazer/jimmy 1969-82 manual on pages 186 & 187. also in chevy service shop manuals for roughly the same time period. thanks.