The engine oil flush is kinda what I'll be doing, in a roundabout way... I haven't opened it up and smelled it yet, but I have a feeling Seafoam has diesel in it.

I was planning on using some diluted windshield washer fluid, since it's basically methyl alcohol and water, but since I got the Seafoam for free I figured I might as well try it... If it doesn't do anything worthwhile I didn't water any money on it. Lol

My rockers have the threaded inserts to manually set the valve lash, so I don't think it has the hydraulic lifters. And I haven't driven it enough to know whether it burns oil, but if I have to pull the head off I'm pulling the engine out and replacing every gasket and seal.

As for the rust removal, I think I'm just going to try and find better backing plates, mine are really crusty and bent in a few places.