I have 2 G32B cylinder heads from a 80 FWD COLT and the only apparant difference is one has a grove on the underside that looks to do nothing. The other head is solid on the underside. They take the same head gasket and seems that the gasket just covers the grove.
Is the grove there for some reason? Will the heads interchange? I can't see why not. Why the difference?
Here's a pic of the grove. It's the long grove at the top of the pic and runs the length of the head.
Thanks SOOO much.