I dealt with the impeller issue a while ago-thanks to this forum!! She's a 400 w/ac, but all the ac stuff is off (ac on a 'vert? what's the point?) No clutch fan, no lower baffle, but will those really help if I'm stuck in traffic, or at a light? I also run Water Wetter, that dropped my temps 12-15', worked great. Old Fart, can you elaborate?