It's a carbed 1500 engine, I think out of a '79 X. It looks like it has provisions to mount a fuel pump to the back of the cam carrier. The cam has a corresponding lobe between the #4 intake and exhaust cam lobes. While I never saw anything mounted there, it looks like something had rubbed on the eccentric lobe at some time. One clue? There was a decal on the valve cove that read: Spider 1500. I have another cam carrier that has the same "fuel pump" mounting provision, but the cam does not have a lobe between the #4 valve lobes. The cam does have a slot on the end that would mount a cam driven dist. such as a Strada would have. Can anyone tell me what these engines were in?