i dont really have a running 6 cylinder car.i have a 75 280 that was intended for a v8 conversion.i now cancelled that idea in order to buy a 260 from a friend of mine.the car has a big cam,long tube headers,and a 3inch exhaust with a stock muffler.it has the tripple webbers and msd on it.the car has a wide body kit on it which i have never seen before,and a gnose up frontand whale tail.my plans for that car is to put new frame rails in it and MAYBE a smallblock..maybe(the six was rated around 320hp)