thats way too many heater cores it'll do more bad than good by killing your flow rates. and you dont need 3 cores to remove all thatheat max shoudl be one single and on double if oyu wanted to do that. but if you were to do that i'd put a heater core after every block so it could remove heat from the water before it went to the next block. but you could just use one double heater core and it would handle it just fine. i shipped a fan contorller so you cna just get those 100+cfm fans for benching and turn off like 2 and run the other 2 at 7v when your just idling
