New Radiator trouble

Update: I decided to run the new radiator with three mounting bolts since there was no issue with the new fan clutch. Thanks to Mopardude318 and the other I cant seem to remember for letting me know about the low profile Hayden clutch! I also installed an Autometer mechanical water temp gauge just in case.
I drove it in the Cruising The Coast parade and it never got above 210 even with 5-10 mph parade speed!