Big Block square drive galley plugs

[302moz]

Anyone know of a source for the correct square drive oil galley plugs on the lower side of a big block chevy? All of the replacement ones are a hex drive which is not what they had. thanks John

[302moz]

The plugs are the small 1/4 pipe ones above the oil pan rail. There are four or five of these on the outside of the block. thanks John