well i have always wonder reliable is the northstars limp mode? i have seen some post where some members will say u ran it too hot the heads are no good. but then i see another post that says dont worry about running it hot the northstar was designed to dirve 50 miles with no coolant. so which is it? can it mess up with one overheat or overload or can the northstar be ran 50 miles wit no coolant and the heads still be fine ?