[T/A Fanatic]

I'm looking for a correct radiator for my T/A. It is an original car built in May of '71 without air conditioning and with the M22 transmission. The PHS documentation doesn't include any mention about a HD radiator, and since the car doesn't have A/C, is it considered a base car as shown in the Assembly Manual section on radiators and need an FF code (3 core)? Or do all '71 T/As come with the HD radiator (4 core) FP per the note under the table? Any assistance is helpful. Thanks in advance.