When I started this restoration my engine wasn't locked up b I t pretty darn close. Previous owner let it sit for 20-25 years with coolant on it. Needless to say the waterpump was pretty much all rust. I tore everything off the block took the Block mostly apart, soaked it in crud kutter, power washed, flipped it, drained it and repeated. Put it back together had good pressure so I replaced radiator, water pump, I think everything that attaches to the engine is new. I've ran it a few time, but haven't driven it, still working on some other bugs. But checked my coolant level and it appeared to have debris in it so I drained it and this is what I found. How concerned should I be? Should I disconnect the radiator and run the car with a hose cycling water thru it? Any help us appreciated.