I would not be too harsh with your words, he more than likely has forgotten more about mopars than YOU and I will ever know. Plus he has been a good guy around here, honest and fair.
You have no idea what I know... One thing I know is integrity & restamping a block & calling it numbers matching isn't an example of integrity, quite the opposite...
Okay, just read Oldman mopars follow up post... Restamp but don't call it matching numbers... Yeah, great, now you sell the car & the next person will claim it's numbers matching.... Saw just that scenario back in the 90's on a TX9 440-6 4 Spd Roadrunner... Gorgeous car, incredibly straight, paint a mile deep... Original motor long gong... Guy that built the car restamped the block.... When he sold it I Was there when he told the buyer it was a restamp.. A couple years later it's for sale and advertised as "Numbers Matching"....
Just don't restamp the block & know you've done the right thing....