Vortec head plug size and location

SEL777

One of 101
Hello all, I cannot seem to find the info searching here. The one thread I need to see cannot be found


The motor has been in for years and the builder did not use the set screws I gave him to plug what needed to be plugged. I need to know what size set screws and exactly where I need to plug. I am tired of the leaks and I need this thing sealed up properly. Thanks in advance for the assistance
 
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