Ignition issues on a rather strange setup

[Carcinogen]

I thought GM used the firing order to identify the cylinders..?

The #1 cylinder is the drivers side front most one,,followed by #3,#5,#7..
Passenger side front to rear, is #2,#4,#6,#8..

So,your 2 cylinders with low compression are #4 & #6 ..could be the head gasket is blown between the 2 cylinders and only "leaks" compression,(and no coolant) when it gets warmed up..?..

Its a Ford...

And that is clearly the problem

 

[diesel4me]

Aha,I missed ONE important four letter word !..

Being a GM forum,I didn't stop to think this might not be a Chevy....or take into consideration my short attention span...
I DID read the first post..back when it was posted!....