I've got a 67 Fastback that seems a little lazy off the line.It has a 347, Edelbrock Alum. RPM heads w/2.02's & RPM int. w/650 Mighty Demon, 9.5:1 comp. Comp Cams XE274H, AOD w/2.84 low gear set, 3000 stall, 3.73-9" locker, 26" tall tires. The power band is between 1800-6000. What might be a...