BO29 Barracuda and LO23 Dart and clone 4 speed part

From an NOS 68 Hurst shifter with reverse lock out in original box.

Hurst shifter bolts with the reverse lock.

View attachment 1715107721

View attachment 1715107722

Thank you for those pics.
This picture is from the Reverse Loc/Out Instruction Sheet. Compare washers and spacer. Looks to be the same...
Are the bolts in your picture in zinc finish? Hard to tell, but looks like it. It appears the bolt in this second picture is, as apposed to the shifter housing in black finish.
On the other hand, details like this could have been changed during the first day or week of preparations for the up coming race. But it is interesting to see. The more info pointing in one direction, the more likely it is we are closer to the right answer.

20171105_151255 rev loc out kit.jpg 20170407_192832  Guide Shifter Close-up.jpg