"Ok! Mine is, in fact, a 1971 Mach 1, 351c, auto trans (c6). However, the Marti Report shows a 2 barrel carb. That’s throwing me off. Everything else seems to line up."
It is not unusual for a previous owner (PO) to change out a 2 bbl intake for a 4 bbl intake. In fact, it was a popular upgrade.