Just make sure to get two of the flashers.
While I haven't installed the rear one yet (hazards) for the front one I dremel-ed out the fuse box cover since it was taller than the stock flasher.
Scott
'
Camano' 1986 F250 Supercab XLT Lariat 460/C6
'Chanute' 1980 F350 C&C 400/NP 435 - Gin Pole
But there ain't nothin' wrong with the radio