I dyno tested a B1-BS headed 452 C.I. 440 motor several years back that had 14.7 to 1 comp. ratio, it liked the VP C14+ versus there C12 race gas. Around 25 HP more with C14+ What heat range and brand spark plug are you using now?

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)