Big block cooling question

Good info. In my case the rad. is a 28x18 , 2 rows of 1 1/4" tubes, crossflow, supposed to cool 800 h.p. . CLOSE BUT NO CIGAR !
Good deal, thats what I run 1 1/4 cores, 2 rows Griffin I have no cooling issues even with factory A/C. Went for a 30 mile ride yesterday 92 degrees and hi humidity, never got above 180 degree F.
You have the capacity to cool it can only be 2 things not enough air and/or not enough flow.
It is not rocket surgery but sure can be frustrating and expensive.
Good Luck