Based on build date it is an A53 “S”. Much like mine but mine has the V6W sport stripe and no fender badges for 383S as it is in the stripe. V78 got fender badges and either no stripe at all, or a thin longitude stripe. Cuda’ cars did not get the fender badges either as the call out was in the lower stripe and rear front fender decals. Cuda’ has fish emblems on the front fender below the Barracuda script and the tail panel.
I am guessing Sometime in its life it has been modded to Cuda’ stripes and hood.
Do you have some pics to post?