Dash cap installation tips

I purchased a dash cap for my 73 Challenger with a/c and 1 speaker. I am planning to install it over the Christmas holiday. Was wondering if anyone can offer any "lessons learned' or tips before I get started.
dp73115 wrote:My engine is a 383.
drewcrane wrote:ya know your gonna have to fit the thing to make sure your are all the way back ,yes you will have to check it after your are done sanding the old pad, also one of those electric carving knives works well to cut that foam i think i ended up cutting alot of the old pad off just to get it to fit,
i do remember having to check my fit in and out of the car alot, after a while i got pretty good at installing and removing it about 10 or 15 times but it still looks pretty good, like i said dont get in a hurry because once its in, you wont want to take it out again