Is this a streeet or drag car? What size and type carb( double pumper or vac. secondary)? As stated,start with the stock jets, make 2 passes ( or drive a couple miles) then read the plugs, you're looking for a grayish color. If they're black its too rich , back down 2 sizes on jet & drive again. If white go up 2 sizes. When you have it close take it to the track make a few passes to get a base line et number, then go up or down 1 jet size .The car will either get faster or slower depending on which way you went. Do this until max et is achived!
