Also, to add
Before this, after driving for a bit, I can hear the block and/or radiator gurgle
So maybe air pockets in the system?


1949 Chevrolet 3100 Suburban Carryall
"Bad Guy"
In the Stovebolt Gallery
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1950 Chevrolet 3100 3-Window
In the Stovebolt Gallery
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1966 GMC Suburban Carryall Custom
"Big Guy"
In the Stovebolt Gallery
More pix on Photobucket