my car was originally a 305tbi. i put a 180* thermostat and fan switch in. i reciently picked up a 383 and im really confused on the cooling system. its going to be carbed. the intake manifold has a hole for an aftermarket cooling sensor the guy told me im just lost on what to do. should i put my 180* thermostat back in? and do i even need the 180* fan switch anymore? any help would be apreciated thanx