If Baltimore start their sequence numbers with a 2, then your car would have been the 779th that rolled off the line.
Bear in mind that the UAW called o strike in September of 1969 so full production did not happen until January of 1970.
This may mean that management assembled your car......I'd check all the bolts.😂😂😂😷
My car is F138237 which is the 38,237th to come off the Flint assembly line in April of 1970.