Does anyone know if this is correct or not:

47-55Front Fenders: might have read it here years ago; that the front fenders off of a 1.5ton Truck are wider and fit the same as the 1/2 ton fenders (with 1/2ton coresupport & grill).<but I don't know for sure, might ask for some help in big bolts to get the right answer.
I think I can help with that because I have asked the same question 16 different ways on this forum.
The short answer is NO.
1/2 ton through 1 ton,including Burbs,have the same hood/fenders/grille.1 1/2 ton and up have different hood/fenders/grille(?) to accommodate a larger diameter tire,and yes the fenders are wider and the fender wheel opening is larger.
Some GMC Big Bolts have wider fenders,I believe 4400 series and up,and use the same Big Bolt hood,and associated items.
My truck is a 2 ton Big Bolt cab and fenders.I never saw the chassis or running gear.The cab and nose are off a '53 GMC fire truck.I have no idea how or why the cab and nose were separated from the truck.That is how I purchased it,from someone in the same town as the fire department it was originally from.
I was thinking about putting this cab on a '90 chevy 3500 chassis,originally,but even it being a Big Bolt,it still would need fenders about 2 inches wider.Big Bolts don't look right unless the tires are about 36 inches in diameter or so.
I don't know of anyone making wider fenders,if you did find them,they would probably be fiberglass.