when i put around in parades my engine gets pretty warm,last time it got to 230 and it was 45 degrees outside.i got out of the parade went around the block dropped to 200 in a half block. right now it has a 5 bladed fan with fan clutch. it also has vintage air. i believe it has a 195 thermostat. i thought about going to a 19" 6 bladed flex fan,but i keep hearing mixed opinions. when i look for replacement fans with clutch they show a six bladed fan in all different sizes. when i flipped through the shop manual it says a 7 bladed fan with clutch. i have a new shroud coming 21 1/2 id, radiator has been cleaned and flushed, 4 core seems fine.crankshaft pulley is 7 1/4 water pump pulley is 8" double groove. i was also going to put a new 180 failsafe thermostat. i'm pretty sure its a air flow problem, because you cant feel any air at idle. any suggetions on fans, clutches or pulley.