Understood about the jambs, Personally I would be scared to death to mess something up after a sweet paint job like that. You are more brave than me!!!!! LOL
As for the valve covers, I get it. Some things I am very familiar with and others not so much. For the not so much I will research pics of the subject for my own satisfaction, not that everyone has to do that it's just me.
Looking forward to the final product here. I have an off-and-on '64 Custom Mercury I am working on myself.