I know you dont want to admit the fact that the motor has an issue, I am telling you that PSHknock PSHknock sound is the crank bearing yelling at you. soon you will have metal in your
oil pan saying, babbit! babbit! hey... babbit! it could be as simple as the TQ spec on the main caps being too tight... dude just drop the pan and the windage tray and look at them for cryin out loud
you have been dealing with this for MONTHS, what will one day under the car hurt you in finding out for sure? Do a bearing inspection, not a rod, a main bearing. Overtightened bearing caps KNOCK ask me how I know. That happened to me with a cam install, I made them 28ft/lbs and the motor sounded like the bottom end was coming out. Once it FROZE from oil starvation, we determined that it stopped 10 deg past BDC where the valves did not hit anything. We took the cams, cleaned them and the head and caps although galled and the car ran for another 8K without too many issues... however we feel the additional play in the cams caused me to wipe a crank bearing eventually.
Have you monitored your oil pressure? Did you replace the CRANK or polish it and reinstall?

oh, by the way, thanks for the sympathy on the dead block... all that went wrong was a main and a rod bearing/rod. we plan on putting a new crank, new rings, mains and thrust washers, putting new sensors and selling the shortblock at a refreshed rate. I bought TOTALLY NEW ITR REPLACEMENT BLOCK :naughty:
and I had to go ahead and get another P72 head due to the galling on the bearing journals... didnt want to take a chance on it. hope you get it worked out man,

MIke:thumbup: