Electric or mech fan?

IIRC the pushers "get in the way" under speed. Probably would do better without it.

If it takes too long for it the temps to come down out on the hi way , it might be blocking the airflow , I have a 14'' pusher , mounted as far in front of the rad. as I can on mine/comes on at 220 , 'hasnt come on this summer'' . I also bought an 18''/7 blade fan to replace the 17''/6 blade on it now . I had to make a jig of sorts to trim the 18 to 17 3/4 for fitment purposes , but havent tried it yet. Most of the info I posted came from a couple of guys here on fabo , it took all of it to make my rig work , and I`m sure urs will be putting out more h.p. and heat than mine ---------.
Looks like u have about the same room as mine , on the pump clearance, 440`s and hemi`s are the same length as far as I know , I have about 1/2'' clearance to my 28x19 crossflow rad. if I remember right its around 3'' thick .
Keep us informed on that hemi , AINT NOTHIN FINER !