318 differences 1972/1973
Another little "side note" about the early 70's. Many guys proclaim "I don't have EGR" because they don't have a visible EGR valve.
Well, sorry, but..........the first couple of years Ma put EGR on engines, "all she did" was to drill a couple of holes (functionally) into the floor of the manifold and "bleed" exhaust up from the crossover.
Only way to tell is to look down into the intake
A crop from the shop manual:
Another little "side note" about the early 70's. Many guys proclaim "I don't have EGR" because they don't have a visible EGR valve.
Well, sorry, but..........the first couple of years Ma put EGR on engines, "all she did" was to drill a couple of holes (functionally) into the floor of the manifold and "bleed" exhaust up from the crossover.
Only way to tell is to look down into the intake
A crop from the shop manual: