Are ya sure? non console birds use the same shifter..sometime in early 71 (very early, maybe the second month of production..maybe earlier) the one with the big hook replaced it for all...ive owned a couple orig cars with shifters like above..long thread
this is a pic i snagged from Nasty Z28..they are usually good with info...
i believe the long thread is unique to birds..it needs all the thread for the long plastic knob..Z28s the knob is round,and doesnt need all the threads..ive had dozens of each...