After not having any or very little heat in my 97 Dakota for the last 3 years I finally changed out the heater core. Last year was really cold here and I froze my nads off. Just a pain having to pull the dash to get the box out. Actually went pretty good. Took me 7 hours and everything worked when I was finished. I'm driving over the mountains tomorrow to Denver and will be really nice to have heat and defrosters.