a 350 chevy small block out of a 74 blazer four bolt main putting out approx. 8to1 compression . is a comp cams 268 extreme energy to big for the compression? ill tell you why i ask . ive been farting around with this thing and i cant get a flutter type miss out of it at 18 to 22 rpm --cruising rpm other than that it runs smooth. untill you give it a little gas to go up hill or somethin, you get the vibration.i put new cap rotor wires and plus ,rebuilt the carb ,reset the timing 14btdc 34 total,readjusted the valves, retightened every bolt on the motor, it has a performer rpm intake quadrajet carb comp cams stamped steel roller rockers , i just cant find it ! i tried another carb too. no change . any ideas ?