Thread: 69 427 Big Block

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Do all big blocks have a threaded hole in rear of the block next to the crank on the left side,3/8 or 1/2 plug.Looks like threaded hole is part of the engines lubrication system.

Reply to your post of Sept. '03.

You may find your answer to your L88 question at link below. There is a tech forum there.

http://corvetteactioncenter.com/specs/l88/

Originally posted by cdueced
Do all big blocks have a threaded hole in rear of the block next to the crank on the left side,3/8 or 1/2 plug.Looks like threaded hole is part of the engines lubrication system.

Generally, if my Geezer mind remembers, the oil plugs by the filter is a sign of a 4 bolt main block...............I will be corrected if I am wrong.