Is it pork and ham?

kind of

The labeled ingredients in the Cla**ic variety of Spam are: chopped pork shoulder meat with ham meat added, salt, water, sugar, and sodium nitrite to help "keep its color". The product has become part of many jokes and urban legends about mystery meat, which has made it part of pop culture and folklore.

Mmmm, sounds tasty

It's from the war isn't it? It's just one of those "dump anything you can get in there" foods, isnt it

and... anything they can turn to mush also would be included

Which is why it will never stack up against the almighty flavour of bacon. Truly, the food of the gods!