I have Cliffs kits in 3 of my cars. The drag car is 73 SD455 stock PMD parts,qjet yes its special carb. 12 teens 110 ,12.30s mostly ,3850 lbs no problems. Street SD same ,stock exhaust when hot it will surge in top of 2nd. Need good fuel delivery. Other is 67 ,qjet, 400 auto,Firebird. It doesnt buck or surge. I've read all qjet books I can /could find over the years,Doug Roe. Now I follow Cliffs book. I had secondary air valve flap that wasnt adjusted right from factory,would bog then leave but not all the time drove me crazy.i just loosened screws, readjusted ,fine now.
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