id stick with the mechanical fan. ive read too many threads about people having problems

 

I have seen a few ACDelco radiators with different sizes.
One size core is 34 X 18 1/2 X 1 1/8
two sixe core is 34 X 18 1/2 X 1 5/16
I have also seen the over all size change as well. Any one have a list of part numbers that work.

I have a trans cooler but no engine oil cooler on my current 28 inch core radiator.

 

The thickness of the radiator doesnt matter to fit the electric fans....

Both radiators you listed are 34" x 18.5" so the same electric fan setup should work on both. Just get the radiator that supports your engine oil cooler option and your set.