A mysterious freeze plug item for a small block

I am assembling a 273- 2 barrel from 1967. Bought a Milodon brass freeze plug kit. One item in that kit is a silver colored concave shaped (dish-like or hemispherical - like) item of 1 5/8“ Does this dish belong on this particular engine or is it for another year/size small-block?

Thanks for replying

Ragnar in Iceland

sounds like the cam plug?

Yes it does, but the cam plug is a little bit different for this motor, and I have already put it in. Thanks for your input.

they use (9) 1&5/8 freeze plugs & one 1&1/4 freeze plug on the pass front plus the cam plug. what do you have in the kit?

The kit contains every freeze plug there is on the engine plus the cam plug and the two very small plugs for the front of the engine and three oil gallery plugs.

^^^ that is the cam plug that gets whacked in the center to expand it out to fit. Sounds like you got another cam plug in there.

Some kits have both styles of cam plugs.

^^^ Ding ding ding I do believe we have a winna.

I never understood why they dont have the hidden oil plug in the kits, I knock them all out to tank and clean, then im always chasing one.

^^^ agreed that little [censored] is hard to find sometimes & for sure you dont want to leave it out.

Yup - picture of kit on Summit's site shows both style rear cam plugs.

Thanks guys for identifying this UFO. Yes, I agree, it is not good that the kit does not contain the hidden oil plugs.

Ragnar in Iceland