Mild 340 build runs hot

my 426 stroker and 340 both run cool with stock rad shroud and clutch fam never overheats no matter the temp outside , sits in city traffik runs 190 max , only thing that overheats is me . I figure the factory knew what they were doing

Same here. Mildly built 340 here also, factory rad and shroud, 5 blade fan runs a steady 165, when sitting in traffic more she'll creep up around 185 or so. Seems that when I read about overheating, there usually seems to be an aluminum rad, or electric fans, with maybe no shroud, and(possibly) a serpentine system involved.