Classic industries radiator finally gave out

Pay attention to the overall core thickness, as it may limit your options for a fan. I say this because the 2 rows of 1.25” tubes may actually take up more space than the 3 rows of .75” tubes in the Champion radiator I run. The 3 row will have an extra space between rows so it’s hard to say. But I know I wouldn’t want any additional core thickness compared to what I have.

according to their specs the depth of both the 2 row with 1” tubes and 2 row with 1.25” tubes is 3” which is roughly the same depth as my current radiator, as close as i can measure. I have about 3/4 of a inch in between my clutch and current radiator, whats the closest i should run the clutch to the radiator? 1/2”?