383 Duster Radiator/Mechanical Fan Combos

I've had the same issues with a 440 in a 72 dart. 3 row champion radiator. I have an AC compressor that extends as far forward as water pump pulley face which causes additional issues I've moved my radiator forward 1/2 inch by relocating mounting tabs on radiator. Running a 18" fixed blade fan from derale with a 1" spacer. Clears my compressor by 1/8" and radiator by 3/8 inch. "Should" be enough. Custom shroud I'm still working on.