It looks like a very early Manta B, single slot grill, chrome bumpers. Obviously wheels and lights are not original, and I would hazard a guess it would probably be a 1.9 with a varajet carb and a 4 speed, but the engine size and fuel delivery varied with country of sale...sorry I can't be more specific.
The bumpers are the 1 feature which narrows it to '76-'79...In '80 they switched to plastic bumpers, in UK at least....