I've had in the neighborhood of about 16 or so Walkerized saws - 394s, 066s, 372s, 440, 460.
Some were good, some were not so good. The one thing he was doing at the time that really bothered me was dropping the lower transfers
all the way to the bottom of the cylinder, regardless of the model. This works ok on some saws and not so good on some others. The best
runner of his I ever had was a 394 - it had the "dual pipes" muffler with the stock outlet completely closed over, WJ-39 carb, and moderate
exhaust timing.
Another issue I've had with his shop is inconsistency. I had two Walkerized 066s one time and the porting between the two was completely
different. It was almost as if two different people ported the saws with different recipes (which is likely what happened).