Things Change.. Butters is now getting a 392

I do have another spare harness but it's a 5.7. Not sure how I'd feel about that tho.. I'd have to cut all the wires at once and then trust color coding or pinout location etc. get 1 wrong (which is actually 2) and it's screwed. I'd rather cut 1, splice and then move to the next. rinse and repeat.

Oh, really good point. Didn't even cross my mind that cutting them off in bulk would introduce the potential for getting wires crossed. Add that the pinouts could have changed too, if the harness aren't the same.

I don't like splices myself, so I try and limit them when I can. Not sure which direction I would go if
I was in your shoes though.

The Eagle in Hoopty is a 2014 5.7 out of a pursuit.. I'm just not sure what size alternator it is, being a pursuit model. Crazy how expensive alternators are for these things...

I found one listing that showed "Pursuit" on RA and it was for a 220 amp unit. Betting there won't be any different between the two you have.

Maybe find a lower amp unit locally and take yours in to the store and set them side by side? Then you don't have to spend any money to see if it is actually different.