Heater isn't warm/hot. Does dash HAVE to come out & what about a/c freon? on 2001 Ford Ranger

Does anyone know of a book that is particularly good on heater core replacement for a 2001 Ford Ranger? 4.0 v6, automatic, a/c, 4x4

Asked by for the 2001 Ford Ranger
dash does not have to come out, but the evaporator case has to come out. 4 bolts behind it to drop case inside to get to heater core. a/c has to be drained. not an easy job. better left to a shop.
Thank you, Mrfordman. A shops cost is WAY out of my price range. With this book & youtube videos is it possible to do it correctly myself?
yes but may take a little bit to do.