Here's my experience:
Grady how old was your radiator? I did the change to fan temps WITH the original size RAD and no issues what-so-ever (NEW stock rad). [edit] Actually the temps never went above the "O." This was in 95* temps (max) and full H/C/I. Many times peeps old rads are pooping out and they change to a bigger one and think it was the size that made the difference. This was in 95* temps (max). There is no need for a high volume water pump from all research I have done but welcome to opinion. The big radiator I only added with the big block c.i.
I dono Keith
I don't see how the age of the rad would have anything to do with what all
happened
I guess my line of reasoning is ........
One summer my cooling system was getting by as long as I kept
moving and had airflow
I put on different h/c/i which gave a 20% power gain and overwhelmed
the very same cooling system the next summer
The nice Stewart pump was done because I could get it at a better
price than OEM
I mean ... Why would I not want to take advantage of that
And that 95 degree day
it gets that hot before lunch down here
It is not uncommon to see triple digits until 8 or 9 pm
Grady