Newbie Question

[Bago123]

Hello guys,

I'm new on here. Just about to start a BBC build (454) and wanted to know if any of you guys know what this plug is for on my block?

Is it an oil galley bleed?

Kind regards
Ian

https://flic.kr/p/2jZmmWg

[jerry clayton]

Thats an hokie patch up fot a plug that couldn't be removed so they threaded a brass nut over the 1/4 pipe plug and then threaded another plug into the hole----that is the left front of a BBC and thats where the side oil galley feeds inward to feed oil to front main and cam bushing