I would never ditch the clutch fan to gain radiator core clearance. The OEM 3 core narrow brass/copper is enough cooling for an A-body 426 HEMI, and enough for a 340 A-body with A/C. The clutch fan and proper shroud are the secret to proper cooling and don't steal 20 HP and make a bunch of noise in getting it done. I'm currently using the original 53 year old three core mopar radiator in my 69 Barracuda to cool a stout 468 automatic with A/C. It has proved to be capable up to air temperatures of 95 degrees in traffic with A/C on. Maybe 100 degrees would exceed its capability but seldom do we see such temps in mid-Michigan.
