Need some help..first truck/first time posting on here! 1971 GMC 2500

[ItzhakRoberto]

Hello...so I just bought my first truck off a coworker who got it into a fender bender.....so i got the truck real cheap and I'm going to slowly fix it back up...
Its a 1971 GMC 2500 Sierra ..or a Sierra Grande...two tone green and white with all the trim on it....paints real faded, but i love the color.

My question is would a 67-69 or 70 radiator support and fender fit on my truck?
Theres a guy close to me who's selling one cheap but i don't want to buy it if it won't fit right....i know the grills are different through those years....i've heard different things from different people but i am sure I'll get the right answer here.

Hope someone can steer me in the right direction!

Thank you!