I used a late model ('96 or 7-ish..) Tbird fan before. Was awesome and moved a TON of air, even on the low speed (they are a 2 speed unit) they are pretty deep is the only issue.
They fit the 28" Summit radiators perfectly too.

This time around on my current build, I am using twin Spal fans, since don't have the depth for a single big fan with the motor in the middle. The twin allow me more room right in the center where the water pump hub is (non-Mopar setup)

Car is nearly done, so can't say for sure how the system will cool...but I am hoping it should do the trick.