THIS IS THE CORRECT RUBBER GAS PEDAL FOR FULL SIZE 58 TO 64 CHEVYS, IMPALA, BISCAYNE, BELAIR, THIS IS A HEAVY DUTY RUBBER PEDAL, WE WILL INCLUDE THE PLASTIC INSERT ON THE BACK THE RUBS THE THROTTLE ROD, THESE HOOK TO THE 2 STUDS THAT ARE SCREWED INTO THE FLOOR, WE HAVE SOME NOS STUDS LEFT FOR SALE IN OUR E-BAY STORE, GM ALSO USED A CHEAP PLASTIC PEDAL IN SOME CARS, this is the correct pedal for 58 to 64 chevys,  WE KNOW CHEVYS