I'm running a 502 with a Griffin with a 13-pound cap and a (IF I REMEMBER RIGHT) A Weiand aluminum pump and a 17inch flex-fan. I have no cooling problems what so ever. With a 160 TStat it runs 160 with a 195 it runs 195. Make sure the shroud is sealed up close to the Rad. The electric fan infront may be doing more harm than good. Good luck
Water wetter also does work.