I was just wondering, what did you guys use to blank off the coolant outlets on the rad and the thermostat housing? At the moment I've just linked the small hose from the thermostat back to the rad, but I'd rather blank them off. I was wondering if the vacuum caps on the carb rubbers would be OK to blank off the coolant outlets, ie one on the thermostat housing outlet and the other on the rad. Anyone done that?