D6 water pressure question?

With everything right on the cooling system it should maintain a 6psi pressure. Be sure to open the vent valve on the pony motor to remove all the air.

How did the liner protrusion check out?

Liner protrusion seemed fine, checked it with an antiquated guage (not sure how accurate), by the pony vent, do you mean the bleeder between the head and the pony on the connecting pipe? or is there another bleed off plug somewhere? Also wondering if to the pressure relief is working properly, may have to test it somehow?

So what were the projection readings and was it checked with the liners clamped down? If it wasn't done right you will get to do it again.

To test the radiator pressure just connect a low pressure gauge to the overfill drain pipe with a piece of hose.

Yes, the bleeder valve on the connection pipe is what I was referring to.

What a fantastic restoration, including cab. Got a question about the fuel injection pump?? What does the decal say?? Might that be someone who rebuilt it?? Bill Walter

Pressure in the radiator after warm-up is normal, if it is not blowing water out of the overflow pipe and not making bubbles in the radiator, leave well enough alone. You won't believe the number of people who have taken cylinder heads off just because there is some pressure in the system. You warm up water or air and they will expand, the system has a pressure cap to help reduce bubbles forming and raise the boiling point a little to reduce the likelihood of damage if the needle hits the red range.