I am interested in purchasing a Demon carb and don't have enough info to select the one I need, so I am looking for what will get me close. I have a 350 chev with 202 heads and a healthy cam(I don't have specs) Supposed to be 12:1 compression or so but don't know for sure. Victor junior intake, HEI ignition, crappy running Edelbrock carb. 14lbs of vacum at idle. 4 speed with 373 gears and normal height tires in a 1962 Impala(heavy car) The thing Is pissed from 3000 rpm on up. Inconsistency with the carb at idle and seems to leak down as well. I would like to replace carb. Is this enough info or what else should I look at?