Ok, I'm game, I'll add to that queue!

So, definitely a spun bearing. Go ahead and pull it and put it on the stand. You're not going to gain anything by trying to investigate with the engine in. Regarding the oil drippers, that is one of the features that differentiates the 400 HO from the lowly base 400:
(Cam, Carb, longbranches, oil drippers and a windage tray). Though lacking in respect and notoriety, the 400 HO is a very worthy engine that in stock form pumps out ~370 HP- more than a 440 six pack. Obviously I am biased here, but everyone seems to be recommending a new engine, but I say why not rebuild what you have? Especially if cost is a factor... if you find an honest machine shop, they won't do work that isn't needed, like boring it or doing head porting. You could go a long way replacing the rings and bearings, honing the cylinders, valve job, new valve train, and magnafluxing everything. If they find anything else worn- fix as needed. Since you are on a budget, that should help contain costs. Plus, you'll make a better investment putting that money in your numbers matching 400 HO engine as opposed to spending it on an incorrect engine. Even if you save and store the #s match engine, you car won't have its maximum value until the 400 HO is rebuilt and reinstalled- so ultimately, one way or another, you'd be paying for two engines instead of one.
The downside, of course, is the risk of blowing the engine beyond repair, but really, how risky is that? Are you going to the track every weekend? Are you drag racing every zit-faced kid with an NOS equipped Accord? Or, do you go out for cruises with family and friends, occasionally doing a short posi burn or flooring it on the onramp? If its the latter, I don't think the risk of losing your engine is that great. Mine is as strong as every since its 1981 rebuild- still has great compression, and has never been bored out. And, JimC has something like 2 million miles on his never rebuilt 400 HO.
A numbers matching 400 HO 4 speed coupe is a rare and special animal, and is a direct decendant of the '69 Trans Am. I say get some long branches and an 068 cam, and rebuild it to stock. It will more than pay for itself in increased value of the car. That's my 2 cents, 'nuff said.