I got to *****

other than going custom the biggest rad you can get in there is a cross flow from Howe. we use them in our hemi dart in our AZ summers with no issues, but using a 7 blade clutch fan.

if you want bigger drop the core support 2" and make it a standard down flow. you can bring the top tank up about 1/2" over stock for more core (cooled a 605 hemi with dual electric fans).