Question about standard radiator size

Hi,

I was just wondering what the standard radiator size was on a 351 Cleveland car. Mine is a 4bbl w/o Air Conditioning and has a 20" radiator. I had ordered a new fan shroud which was advertised for a 70 351 Cleveland and received a 24" shroud. When I inquired about a return, the salesperson asked if it was an original Cleveland car since the radiator was for what he considered, a small block (Windsor, 302, or 289).

Thanks,
GIl

Hello. I have same engine/no air combo and my Mach 1 had a 20 inch radiator originally. Have since upgraded to 24 inch...

the manual I have shows a couple of options for a 351.

20 inch for 351 without a/c and without a 3.5 diff
24 inch for either a 351 with air or if you have a 3.5 diff. Must be due to higher revving.