Well, Mike has come up with the info...thanks Mike! So, below is the parts page for your consideration. Below that I will add the page with the crank bearings and another for the oil pump.
Item 9, the lock strap for the connecting rod bolts should have kept them from coming loose. You didn't mention WHY you thought that they came loose. Are the threads OK? If the lock strap was still bent up over the bolt head then I would fear that some sort of thread failure has occurred and should be thoroughly investigated and resolved before any reassembly. Also, if you use plasti-gauge to check the bearing clearances that will tell you just how appropriate it might be to use a heavier weight oil. If the clearance isn't excessive then there will be no need to even do that. If it is, but the crank measures out to be not too badly worn...I would opt for new rods.
http://www.boats.net/parts/search/Honda/Outboard Engine/0/BF100B SA/PISTON CRANKSHAFT/parts.html
Below is the page with the crankshaft bearings. (items 7 ...four count) If they are worn you should replace them. Also on this page the crankshaft oil seal is listed. (item 20) I would replace that regardless of any other parts selected. It would be a shame to have it leak after reassembly because you didn't.
http://www.boats.net/parts/search/H...0/BF100B SA/CYLINDER CYLINDER HEAD/parts.html
Below is the page for the oil pump. I would urge a thorough inspection of it before reassembly. In addition, this page has some gaskets listed that can fail and cause you mucho grief. I would not reuse the old ones because of this. Item 17 is a good example. That is the exhaust pipe gasket at the head. If it fails, the engine will begin having dying symptoms when the hood is on. When the hood is removed, the engine will run great. This is because exhaust gasses are starving the engine for oxygen. And, while you can make a new one from stock material, the same cannot be said for items 4, 14, and 23.
Then there is the oil pump relief (check) valve and spring. Items 9 and 10. I would not reuse the spring. Springs that are 30+ years old can be very unreliable.
http://www.boats.net/parts/search/H...A/OIL PUMP OIL FILTER EXHAUST PIPE/parts.html
So, what I'm saying is that I agree that putting her back together and running her without spending a bunch of money is a sound idea, I really think a little thought and care before "slapping it back together" will surely reap big dividends for you in the long run. This is an opportunity to do some "prophylactic" maintenance for trying to squeeze the NEXT 30 years out of her.
Good luck.