NegativeZero, Jerry's comment,
Quote Originally Posted by jerry clayton
Most tuning places will be tuning your car for max HP so will want higher octance fuel to run more timing advance------
made me think that you need to be sure that the tuner you're going to knows how to work with an old school carbureted engine with no computer controls. Most of the hot shot tuners today tune for max HP and Torque like Jerry says, knowing that the computer will then take care of any differences that come up, and even self learn the changes over time. Take them a new Mustang, Camaro or Challenger and they may tune it with BP 106 octane, and then when they fill the tank with 93 octane the ECU will back out a ton of timing, and may increase the signal to the injectors to keep everything good. You need an old school tuner, not a kid who only knows the modern stuff, IMO. Or tell Jerry you'll buy his gas & hamburgers for a trip to Choctaw, OK, and let him have some fun!