71 350 running hot coolant backup up problem

[Gregski]

OK, so back to the Timing thing, I did some more testing and I found that the vacuum can on the distributor was kaput, did not respond to my vacuum pump at all, so I decided to replace it with a Crane Cams adjustable one just because that's what I had in my pesky inventory of junk

It appears that the new can is good for an additional 14 degrees of timing so 12 degrees initial plus 14 vacuum advance (since I am hooked up to manifold vacuum) gives us 26 degrees, so where is the other 10 coming from? (edited 2/9/2017)

whoa additional 14 degrees for a total of 36* at idle that's allot! or that's too much? remember this can is adjustable so we can adjust it, and we need to start somewhere, so this is a start

now before we start WWW III arguing over weather to use Ported Vacuum or Manifold Vacuum or Vacuum at all, LOL I will take the truck for a test spin