I've run a 22" generic aluminum two tube cross flow that came from a local roundy round shop for around fifteen years and never had any cooling issues. I run a MP viscous fan with a factory shroud cut down to fit. It's cooled my 340, 408 and now a 434. The car is 3350# and runs 6.40 at almost 109 mph in the 1/8. I've seen 185° after a pass at the strip, most of the time on the street it runs 170-175° with a 160° thermostat.