51 ford car-radiator placement

[Shoebox]

I went through this over 10 years ago and just can't remember. In a 6 cylinder car the radiator mounts ahead of the core support. In a V8 the rad mounts behind the support. Are there 2 different supports or (dare I say) like in a 55 chev, the radiator simply mounts in the front or back position? Thanks!