Try putting a quart of trans fluid in the oil and run it for a day or two... Trans fluid is high detergent oil and will help clean out most of the gunk...
then inspect and scrape off what is left if any...
if any small chunks get sucked up, they will accumulate in oil pump rotors, bind them up, and shear oil pump drive. If you want to tow it home when that happens, because it aint going to happen in your driveway, have at it. Been there, done that.
