Replacement Radiator Help and Alum vs OEM style

DemonK9 said

That seems to be a little tight for clearance to rad.....I am no fan flex expert, but your fan does flex when you apply heavy RPM's. Not sure if this flex or "growing" goes toward the rad or back to motor away from it. You may want to test without rad in for a moment and give 'er some throttle from under the hood and watch the fan.

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Certainly sage advice and always appreciative that people take the time to add their thoughts, comments and input to any dilemma that i've requested help with.

I will mention though that from back in the day when I had experimented with a flex fan I was always told that the fan blades would have more of a tendency to flatten when RPM's were introduced and that appeared to be the case that I witnessed with the Flex. The steel fans are pretty stout and I do not believe that they would flatten much but i'm hardly an fan blade flattening expert...Lol
That said, I was actually running less clearance than I'll have now on my prior combo and had done so for many years.