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Thermostat housing plug sizes

780 views 1 reply 2 participants last post by  NAJ 
#1 ·
I forgot to gank the plugs from the thermostat housing before I sold my old head, and I threw away all my old TBI heads...

I need to know what size and thread plug goes in place of the top plug and the coolant line out the side of the thermostat housing. Anyone know?
 
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