440 in a body radiator
with the HDK kit we are using a '70 challenger 26" radiator (AC version) with the Mopar P2998326 fan shroud, and a 19" flexlite fan 400-1719
the part number for the radiator from griffin that i got is 5-70058, which has the auto trans line hookups. the non auto trans version from griffin is 5-00058. those are both aluminum radiators very pricey units. but they are stock fitment for a 1970 big block challenger with AC/26" radiator
i'm pretty sure the HDK kit places the engine in the same physical postion as the schumacher mods
p.s. that radiator has driver side lower hose hookup, it's for a water pump with driver side inlet