freeze plugs

Hello. I have a 1983 HJ60 with the 2H engine and lately i noticed that it is loosing coolant, at first i thought that it might be because of air in the system since i did a flush not to long ago. A couple of days ago it decided to suck the expansion tank dry during a 15 minute drive, so i...

1977 is running about 177° (infra red gun) at the freeze plugs when warmed up and idling but the temp gauge slowly moved all the way right as it warmed up. I think the gauge may be from a '79 (the amp meter is). Is the sender from a '79 different than a '77? thanks