OK. I have the blower and manifold off, and the head. I got a spring compressor and looked at the valves. They look good.

However, the lifters I'm thinking are bad. Not at teh lobe. But, some appear frozen. I cannot push two of them down at all, others vary.

Sound like the culrit to you?

I"m headed up to the parts store. Plan to replace lifters, push rods, and broken parts.