What do you all use for aftermarket gauges? It seems like these "universal" gauges don't seem to have the right fittings for the motor. 1965 225/6 1 bbl auto. I just got a universal water temp gauge and all the fittings look too large for the small /6 temp sending unit. I really don't want to drill and tap. Anybody have a simple answer? Also I have an oil pressure gauge for a 318. Will that sending unit work on the /6? If not what's a part# for a gauge I can use. Thanks all.