I respect Ken's opinion, and clutch fans usually work fine, given the appropriate clutch and full fan shroud. However most cars for the last 10-15 years or more have had electric fans, and they work fine if set up correctly. I have an electric fan (puller) with a full shroud on a 435 HP small block Chevy w/ 700R4 in my '34 coupe. It runs steady at whatever temperature the thermostat calls for. Before you switch - Is your electric fan a pusher or a puller? Does it have a shroud? Photo? How are you cooling the 700R4? Tank in the radiator?