I just came in from working on cleaning and re-installing the pan....steam cleaned the inside .....sand blasted the outside. My 3500psi steam pressure washer cleaned it up pretty well with 190 degree hot water. That stuff on the internal parts won't come off unless it's tanked. So she's all buttoned back up with fresh non-detergent oil. I'll install a filter next and maybe I'll get another 90K out of her.
The compression test results were ....starting with #1.....80, 82, 85, 85, 74, 76. Not too bad really for a 5.5 compression ratio.