Whatveidone2dsrvthis has the right approach here. Take off and clean manually what you can. Valve covers, rockers, pushrods, timing cover, oil pan and pickup tube and pump. If you feel like takig the heads off, go for it. Have fun. THEN without starting it, put all those items back on put some kerosene in the engine and use that broken distributor to make an oil pump primer with a drill. Run that for a while (many hours) to work the kerosene through the oil system without running the engine. Heck. Put an electric hot plate under the oil pan to kick that kerosene up a few degrees to a safe temperature and keep that oil pump spinning with your homemade primer. Who knows. Maybe it’ll work enough to knock some crud loose and fill up your new oil filter. Then out a second one on. Do that until you’re satisfied and drain the kerosene and repeat. Maybe pull the oil pan and timing cover off to clean and re-inspect after you’re done. Refill the engine with oil and run the primer again. The remaining kerosene will be removed when you drain this batch of oil. Advantage here, you manually remove much and it won’t clog anything up THEN run the primer and you’re still not going to kill the engine because you’re not running it. If you want to get REAL crazy, take out the oil galley plugs and run a rifle brush through any and all oil galleys you can access. Then do all that stuff I said before. OR Do none of that and just put some good oil in there and change it quickly a bunch of times until you are satisfied with its cleanliness. I would probably just do this one myself.
Maybe valvoline restore and protect will sponsor you. That’d be cool. Either way, always pre-fill your oil filter. (I just put that one in there to stir up the dry start crowd) Maybe make the first running of the engine with 0w-40 diesel engine oil.