I have a 69 Chevelle 13427 orange post car(72-72) that I am restoring. It came with a 396 4 speed and according to the radiator tag it was a 375 horse. " BO" is on the tag. It was found in the Wausua Wisconsin area. Anybody from that area maybe remembers this car? Bob Johnson Chevy was in Wausua and sold some Yenkos so maybe it came from there.