removing dash

i am in at the point in my camaro when i need tyo change the dash pad, its nasty tan with nasty shit all over it. i want to either clean it or re-wrap it or get a new black one. either way, i am in in the milldle of it and theres a ton of screws in the dash. is that what i have to do is take the whole dash out to do so, its a 74. any help would help if anyone has done this b4. and sice im there, shoudl i change the heater core? im not ever sure isf thats where it is, i have not looked.