Bill, been following along your journey on YouTube. I've been piddling with my 39 GMC for a couple of years.
Do you still have your original lifters out of the engine? I just sent my 228 lifters and cam off to Oregon camshaft on Tuesday to be refinished. I have the same style lifters. I spoke with Ken on the phone and he's got about 50 years of experience. He knew exactly what I had when I told him I was working on a 228. You might give him a call and pick his brain.