I got my mopar performance viscous clutch fan package from jegs. I switched from a stock, non-clutch type 4 blade fan to the viscous fan, and I noticed better cooling before I did my other cooling system upgrades. Car felt like it had more pull in the higher rpms too (car has a well built 340). Afterwards, I also upgraded to a mopar performance 6 blade impeller wp, and a 22" custom mancini racing aluminum radiator, and it never goes over 180* The car does not have a shroud.