Most the Boonie engines I ever saw were white... The 1972 codes out to about right... BUT the forth digit into the model number is a nine, which means vertical crank... So the cover does not belong to the engine... Actually if you look, it should be slanted in on the front side because the vert shrouds are... they look different from a horizontal shroud..
It does not matter what coil you get... If it's for a briggs 4 or 5 horse flat head it will work... Although I would get a newer EIC coil so you don't need points.. They are so much nicer to work with, although I think the points motors run better if ya play around with your point gap...