RE: Aftermarket radiators?
Pretty much everyone uses a Griffen.I dont remember the part number, but its the generic fit for Fords.You have to modify it a little but it fits with the blower, cause I have done a couple with Vortechs.
You have to cut off the radiater cap neck and weld it up, and weld on some tabs to mount it.
You will then have to bend the lower radiator support to essentially lower the radiator to clear the inlet tube of the blower.