57 GMC vs Chevy fender questions

[RRinWT]

Hey Guys!

I just got a call about a 57 GMC 1/2 ton for sale locally and was wondering how hard it would be to install a chevy grill? I've never had my hands on a GMC TF so I'm not sure if the grill opening is the same shape or not between the brands. Any input would be appreciated!

I'm actually looking at 2 trucks right now, one is 58 Chevy short fleet w/ no title and the above mentioned 57 GMC long step w/ title. Same price so that's a wash. Just trying to figure out how much money I'll have ot spend to get my 57 Chevy grill in it. Yes, I know it requires a whole different front clip for the 58 to 57 conversion. Just not sure about the 57 GMC to 57 Chevy conversion.

Thanks

Rob
in West Texas