I built my 1971 Duster to be raced on pump gas on the streets of south east L.A.,that didn't happen due to health issues The car weighed 3450 lbs with me in it with two batterys and a full tank of fuel, it is a ladder bar coilover rear suspension car with a 400 stroker motor, 518 C.I., lader bars and coil overs, three inch exhaust to the rear bumper, full interior and so on. It has ran 9.993 at 134.6 MPH on Oregon non ethanol 91 octane pump gas through the exhaust with the air cleaner on To get the most you can out of any combination you need to make every part from the front bumper bolts to the rear bumper bolts work the best you can get them to, motor, converter,tranny, exhaust, ignition, fuel delivery, front and rear suspension and so on Test,test and then tests some more Two adages come to mind on cars and going fast, big is best, motor, tires exhaust, and light is right in every part, crankshafts,pistons wrist pins and rods, wheels and tires, total weight and so on