There was a change to the tailhousing. The early ones used the donut style mount and had the bolts inline to the tailhousing. The later ones used a mount that was perpendicular to the tranny. My C4 has holes for both style mounts. Yours may work with the early mount. The first year for the C4 in a Falcon was 65 so if you have an original 65 mount then it may work. The FalconParts.com mount will still be stronger than the original and I would recommend it if you going for big HP numbers.