Did the 340 really make 275hp?
When the '275' horse 340 came out in '68 the NHRA IMMEDIATELY refactored it to 310 horsepower. The '70 sixpac engine was refactored to 325 horsepower and the '71 340 was factored to 330 horsepower. Every factory stock rebuild I have seen made at least 315 horse and most were above that figure. Several years ago Dick Landy built a '68 340 to stock factory specs. even used the AFB carb and it made 315 . The '71 was IMHO the strongest of the 340 offerings. It had the wonderful TQ and the well designed TQ intake manifold.
Terry