Here's a very nice pair of 1CM mercury Heads. These came off a motor that was purchased from a local Ford Dealership New and used to power a boat on the Hudson River (fresh water).The builder didn't like the way the flatty powered the boat so he swapped out the motor after a year or two and stashed it in a storage building for about 35 years until i bought it.No damage that i can see .These work fine on an 8BA and,of course,are much cooler because they say Mercury!. Price is plus shipping.