I'd use dual spal 11" fans and stagger them, they have lots of clearance and work great, you'll have to make your own mounting plate but it's worth the time
Try checking out the SPAL website, we've put 426 hemi's in darts and never had any clearance issues, you can get 2 11" fans and they're only 2 1/4" deep and also using two staggered fans will give you more water pump clearance.