In all fairness to the Road Runner,
The 1968 Cutlass 'Ram Rod' was a car that was prepared by the
'Oldsmobile Specialty Performance Staff', aka 'Dr. Oldsmobile'.
The 350 Engine was 'fully blueprinted'. And the 'Ram Rod' came
with a specially calibrated Rochester MV {800 CFM} Carburetor,
a Distributor with a 'performance curve', and 'tricked' Mufflers.