Let’s hear a 340 story

Please elaborate about the racer brown cam

In 1968, the 4 speed 340s got a different cam than the automatic ones. It was made by a company called Racer Brown, and it had a bit more lift and duration (and, hence, better performance) than the automatic cam did. In 69, both 4 speeds and automatics got the same cam, and it was the 68 automatic one.