Did the 340 really make 275hp?

My recollection is that the 68 340 with 4 speed had the the highest output of the 4bbl engines. Automatic had a slightly milder cam as did all 69's and up. Does that ring true with anyone else? I had a 69 Cuda FB with 340, 4 spd, manual everything and 4:10 rear and it was pretty quick. Maybe the Wednesday cars were closer to 325 and the Monday/Friday cars were closer to 275?