Paul E,
Paul had the distributor in his hands when he discovered the bad bushing. I'm pretty confident he would have noticed a crack but I can check that.
MarkS57,
Paul had the motor apart and I'm assuming since he discovered bad bearings, damaged piston rings, polished the crank and did a light honing of the block, he would have noticed the cam bearing. As for the oil pump. Several months ago when we pulled the motor, we switched out the oil pump and shaft and ran the motor. Same knock was present. We spun the pump by itself and did not hear anything unusual. This was done by another forum member who knows what to look and hear for.
grivera,
Early on I sent pictures to Paul of the windage tray which had the witness marks on it. He originally said the "One Washer" spacing could have caused the witness marks and the knocking noise. He advised to space the windage tray with two washers, which we did and the knocking noise was still present. That's when we worked out a deal for the carburetor. When the motor continued to knock after that, Paul said the witness marks on the windage tray were caused when he hand spun the motor checking for clearance of the windage tray. Of course that's when the deal with the carburetor fell through and I had to pay the difference in order to get my motor back.
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