2wd 1/2 ton to 3/4 conversion question

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Looking for some input on a project I have in mind. I have a nice 2 wheel drive, 1/2 ton 1985 long bed pickup. Recently I got a line on a 2 wheel drive 1983 3/4 ton suburban with a 454 in it for cheap money (Body rotted but drivetrain & frame good). Engine /tranny swap is not a problem. My question is are any of the frame points different? Can I remove all suspension, upper / lower control arms, front & rear springs & shocks and just move over to the 1/2 ton frame?

I had just planned on doing the motor / trans swap but figure if I can upgrade the whole unit......why not.

Thanks