Fuel injected gas tanks vs. no FI

[kevinr1970]

I have this '87 lwb parts truck with a TBI 305, 700 r4.
The body and interior are pretty beat up. Both gas tanks leak pretty badly. Looks like they rusted out due to accumulated junk between the tank and the plastic covers that go underneath them.
My original plan was to put this engine/tranny in my '82 2wd Blazer.
My questions are this:
I found a guy parting a '83 (I think) diesel Blazer and was wondering if this tank would work for fuel injected gas? If I got the fuel tank and fuel lines would I need anything else off of the Blazer or would I have the rest of the parts in the truck?
Or:
Another guy is parting an '82 (I think) GMC lwb diesel. I have the front end parts to fix the '87, but the bed is trashed on the driver side. This GMC has a decent bed. Would the diesel tanks on the truck swap right into the '87 truck?

Can't tell in the pictures but the bed is pretty bent up behind the bumper and in front of the rear wheel.