What temperatures are normal in this area of my furnace?
If you're tripping the high limit, then I'd say it's not back to normal. Sounds like you're not pushing enough cool air through the heat exchanger, which means it can't dissipate the heat fast enough. 

With a conventional gas furnace, you should be at about 140°F-170°F at the supply plenum. A high efficiency furnace will be lower, around 110°F-140°F. However, the temperature at the outlet of the furnace, is dependent on the temperature of the incoming air. If you have the documentation for the furnace, it should give you an idea of the temperature rise you should expect. 

The expected temperature rise, as well as the max outlet temperature, might also be listed on the nameplate of the furnace.