[Oletrucks] GMC vs Chevy TF fender question

[Rob]

I need some input on the differences between GMC and Chevy Task Force front
fenders.  Is there any real difference?  Can you install a Chevy grill,
specifically a '57?   I have been offered a '57 GMC 1/2 ton long bed  factory
V8 truck for $1000 and would love to pull the GMC bumper/grill and dress it as
a '57 Chevy.  Is it as simple as just installing the Chevy grill?

Thanks,

Robert