I have read on here several times about the sb 400 motors running hot. My question is just how hot can they run without damage? I went out Friday night and basically rolled through a bunch of mud holes and only had to gas it in 1 and my temp gauge went all the way up to the line before the red. It never went over the line but is this running it to hot? Not really wanting to spend any money on it with the 454 swap coming up. Just wondering in case I need to run it before then.