"The 74 4bbl 360 had all the 340 stuff on it from the previous year. All of it including the same advertised compression ratio. So now, there it sits blazing out in 245 hp glory, while the 340 sits at minimum 275. How does 20 cubes less make 30 hp more, wearing all the same parts."
'72 and '73 340's compression was dropped to 8.5-1 and rated at 240 HP. 5 less than the HP 360's