Waterpump-kit for the 1933-1936 Pontiacs. 6 and 8 cylinders. Made by Wibroc Engineering. New-old-stock parts. The shaft diameter is 12.45mm Overall diameter of the impeller is 80.2mm The width of the impeller at mounting hole is 18.35mm Location: UT HG
NA NB cylinder head , it has the finest of cracks between the valve seats on several cylinders , appear has fine grey line , it has been fitted with inserts and guides . pressure tested and no leaks , included top gears . This head was on my car for years without problem however there is a risk hence low price . can ship world wide at cost