Do 250 chevy's have freeze plugs in the rear of engine? My clutch went out and I am going to do a conversion to automatic (saginaw 3spd to turbo 350). So I will be looking at rear of engine thought it be good to replace freeze plugs. However, I only found side freeze plugs at autozone.com online catalog. Either way I will find out when I pull transmisson just like to save a trip to autostore.