No, the dash doesn't need to come out but it's a pain getting everything out from under it, especially if you have with A/C. I had to remove one of the vac valves to get it out completely and then reinstall. Be mindful of the vac tubing connections and routing. Be very careful of the plastic [censored] on the control valve and connector(they're brittle). Console has to come out, so does the radio, glove box, and most of the passenger ductwork. It can be done but it does take some real effort.
attaboy