Any idea what this went in originally?

[YENKO DEUCE REGISTRY]

I use a pair of starter shims to remove the handle. It does look like a 4177 arm, which is indeed a Lemans / GTO arm - only for bench seats though.... While I've seen plenty of 4177 arms for sale over the last few years for very high prices, I don't know of any that have actually sold for those prices - I'm pretty sure us Deuce guys have bought/stashed/installed 4177's into the majority of Deuces that needed them! We've been buying 4177's on the sly and on the cheap since '96 or so