[rodneym]

Again, congrats of the Kirkham. Great mileage for one weekend!
600 just had her maiden voyage a couple of months ago. I know how exciting it is.
Don't know what engine you have but the stock radiator (as long as the fuse issue is resolved) will cool a big block in traffic on a 90 degree day no problem. Generally I leave the fan on in traffic (any weather) and off on the hwy.
And I'm not sure if you came from another Cobra, or if you have Billboards, but if you do, they will feel different all by themselves.
Good luck!
rodneym