Big block + large rad + Mechanical fans = what fits?

Champion 3 row rad in 72swinger with a 440. Had about 2 3/4inches to work with between rad and water pump. I got a derale flex fan with 1" spacer. Clears rad by 1/2. I'd much rather have a clutch setup..but this was the easiest solution for now. Not one person has ever posted how far forward that jag clutch/fan setup extends forward. I know how long that jag clutch is....but the wild card is the fan....as the fan will protrude forward and rearward of the mounting surface of the clutch. Derale actually posted specific dimensions....which is why I went with them. I'm still wanting a clutch setup though.....