Spring choice will depend on how big of a drop you are wanting to achieve, as well as what is being done with the car. Your front is going to sit slightly lower than what is listed due to the extra weight of the 351. If this is a street car, I would recommend the part number HR-51650 for a nice balance on ride height, vs. ride quality. These are still plenty compliant for street use. If this is going to be more road race suited, these race springs are a nice combo.