84' GMC Jimmy Parts interchange

[88Ironduke]

Can anyone tell me if the inner fenders and rear bumper from an 84' Jimmy would interchange to my 72' fleet side? I assume its a Jimmy, I guess would be the GMC version of a full size blazer. My drivers inner fender is rotted on the top mount points but is pristine on the bottom. Hoping that GM didn't reinvent the wheel yet. Rear bumpers, same sorta size? Got a nice option at the junk yard here and they are clean but don't want to attempt to pull everything just to find out they are not interchangeable.

Thanks in advance.
88Ironduke