When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
There is an extra hole on the timing chain cover on this 303 Oldsmobile. There is not a hole in the block for this so does a PLUG go in here or something. This may be a stupid question LOL. See photos attached. Thanks for any help.
Top right hole! Plug?????