I have a 1981 chevy malibu and the car backfires when i give it a lot of gas when im driving it. so under a heavy load. and it also idles low in gear but i idled it up a little and it seems better, it has a 350 bored over 60, and new comp cam, HEI distributer, wires, plugs are all new andgapedd at .045. the timing is zerodegreese,and on the timing tab i cant read anything on it and half of the words are off so i cant Find top dead center. it has 3" dual exhaust flowmaster super 44 series.
here are some specs and thanks in advance
bored .060 over. dual plain intake. comp cam Xtreme Energy™, XS268S
Great for Street Machines, Largest Cam for Stock Converter
PART #12-676-4
Xtreme Energy XS268S Mechanical Flat Tappet Camshaft Only
Lift: .488''/.501''
Duration: 268°/274°
RPM Range: 1600-6000
here are some specs and thanks in advance
bored .060 over. dual plain intake. comp cam Xtreme Energy™, XS268S
Great for Street Machines, Largest Cam for Stock Converter
PART #12-676-4
Xtreme Energy XS268S Mechanical Flat Tappet Camshaft Only
Lift: .488''/.501''
Duration: 268°/274°
RPM Range: 1600-6000