Plugging Timed vacuum advance hose

67Dart273 said

I don't know why we need an "article written by a GM engineer." NO these cars DID NOT use manifold vacuum. My 69 RR, my 64 426 neither used manifold vacuum "bone stock" "back then."

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does it matter who he was an engineer for ? I've read a lot of what you've written on here and even asked your advise on some electrical stuff, but do you honestly believe gm timing operation differs from Chrysler and even ford ? I think not, the principal and operation is the same across the board ...