W WillRideAgain Member Joined May 12, 2010 Aug 29, 2010 #1 What size are the freeze plugs in the side of the 231turbo block please.
8 87action A work in progress Joined Feb 19, 2009 Aug 29, 2010 #2 freeze plugs usually 1.5'', kinda standard for GM
N novaderrik Well-Known Member Joined May 12, 2004 Aug 29, 2010 #3 should be able to look those up by application.