missing kickdown linkage

i recently bought a 74 duster,318 and 904, and i noticed the kickdown assembly was missing. all signs point to it being built as a drag car, (big ugly tach, fender well headers,4bbl edelbrock and edelbrock rpm airgap intake installed). Everything down to the linkage arms on the trans. is missing. is it possible they did this because a manual valve body was installed? if so how can i tell? it does run and drive but i havent driven it but around my 5 acre property. no highway speeds.