Sometimes they 'll get gummed up and stick in the position they were in when parked x months/years ago. With the covers off, look for them to all be opening and closing all the way. If they were stuck, you could have bent pushrods. I'm really not familiar with that engine.
"Do not walk behind me, for I may not lead. Do not walk ahead of me, for I may not follow. Do not walk beside me either. Just leave me alone, you're starting to freak me out."
1957 GMC 150
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