Jeff -- This unit is identical to almost every hand rivet squeezer out there as far as design. This same unit sells for almost $50 more elsewhere.
You can pop the pins out and buy a different anvil (the C section), but 3" fits most Mustang applications. Others can chime in on what anvil works best in those special cases.
I opted for the larger of the three at 3" for the added throat reach.
The pin that goes into the tool itself is threaded for depth of material.
Screw in and out to adjust crush.
The die is the kicker here. The set I bought are standard dome and tubular for 1/8" rivet. The height, called "L", is approx 0.25" tall and will not allow you to do the rivet behind the snuffer part of the ashtray. This has nothing to do with the tool as almost all of these are designed like this -- it is a function of the die itself. You can buy longer ones but I'm not sure they sell one of height 'L'=1".
For this one area I'll just whittle up a spacer on my lathe rather than look for this oddball die.