Yeah, I am leaning toward the CLR, or vinegar. Hear you can use Phosphoric acid as well since it is safe for metals. The radiator is not junked up. Like I said, it may have a 1000 miles of use before the motor spun a bearing. BUT it has me learie to just wash it out. I meant to get a picture but got busy redoing the steering column on the old truck last night. There are no real signs of corrosion, just several of these " white sprouts" almost like moss spores that grew up into the air from the top of the core. The inside openings, top of the core, all that looks ok...just these growths. Odd deal. Kind of why I wanted a picture.
Will see what I can do. Only one radiator shop even close to me and up in the air from what I have heard.
Thanks for the replies, tips.
Otherwise, I hope to hear the 445 come to life soon. Been way to long. Lost a full two days this past weekend since I had to do a complete rear brake job on my sons '83 Chevy C10...what a p.i.t.a. Took almost an hour to clean one side thanks to a blown axle seal...thing must have been slowly leaking for years. Add to that about 20 minutes fighting that seal and three trips to parts store. Longest brake job EVER!