I have a 16 377...so should be about the same. Its not so much the screen size that you need to look at, but the overall dimensions.
My old Furion was 48.5 (so 49), with a width of 42.5 & height of 25.4
I put a new 49 Toshiba with a width of 43.7 & height of 24.75.
I had to adjust the televator to the last mounting hole so the lid would close and I have about 1/8 on either side of the opening.
Have fun TV shopping!
'16 Ram 3500 MC CTD Dually, 4:10 rear
'14 Ram 2500 MC CTD (gone)
'14 287BHBE (gone)
'16 North Point 377RLBH (current and hopefully last)