NM = (should be MN?) Marrysville assembly plant 426 = Cubic inches 3570 = 10,000 day assembly date = May 07, 1971 1214 = 1,214th engine assembled 42 = unknown
Can you post a pic?
*BTW, I would assume the "7" in the VIN sequence was a mistake and was probably confused with a "1" when the stamper grabbed it as they look pretty similar at a glance.
