Method 1 - Take a standard 8.5 x 11 inch sheet of paper and draw a 10.5 by 7.5 inch rectangle on it. Place the radio on top of the paper. If the radio fits inside the drawn rectangle then it will fit in the TRC-1. Don't forget to allow for any screws on the side that would hold the radio to its mounting bracket.
Method 2 - Print out the TRC-1.pdf file. and place the radio on the TRC-1 drawing. Not only will this show the fit of the radio to the carrier it will show the alignment of radio and/or bracket to the slots in the TRC-1.