Punch - I'm at a bit of a loss on what hole you are mentioning in relation to the water pump opening??? headscratch Your water pump hole is clearly visible, but I'm not seeing a hole needing a "disk" (core plug seal) in your photo. Please provide a wider view picture and if possible an indicator on the "hole" in question.


~ Dan
1951 Chevy 3 window 3100
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"My Grandpa Carl's Truck and How it Became Mine"
1966 Chevelle (Wife's Hot Rod) | 2013 Chevy Silverado (Current daily driver)
US Army MSG Retired (1977-1998) | Com Fac Maint Lead Tech Retired (1998-2021)