Please help me ID this Holley 2-barrel.

..... I don't think you'll find too much info on it as it was just a non -performance,run-of-the-mill 2 bbl, grocery-getter carb that, like RRR said, usually went into the scrap pile at the first opportunity. I have one of these, somewhere, if you want to run a pair of 'em?

You can determine ported vacuum ports from full-time manifold vacuum ports, then figure out what you need for your vehicle, and cap off the rest. Prolly no electric choke conversion for it, or tuning tips for that matter.

Anyway, have fun with it!

Thanks for the info and guidance, 65. RRR, thanks for the comments, but I'm hoping to LEARN more about carbs. No doubt you have the experience to just junk the 8598s you find.
I got the carb for free, and if I put a kit in it and tinker for a while and come to agree with your opinions - well, hell, I can afford the kit price and have plenty of spare time.
So, no harm done 'cept maybe a new dent in my trash can when I'm done with it.

BC