There has been an influx of younger people getting these trucks from their grandparents with plans for serious mods. Just a thought:
You very likely do not have the skills for this. I am not talking down to you, I certainly don't have the skills either. Maybe you're a master welder and I'm putting my foot in my mouth. I would just hate for you to ruin your grandpa's truck in the pursuit of making it different, under the guise of making it better.
If you got partway into this and realized it was way too much then you will regret chopping your grandpa's truck up.
If you have the skills, then of course anything is possible. If you do end up going down this road, then have everything planned and ready so that the truck doesnt end up as a chopped up rotted field hoarder rig.