Hint: Measure both Frames, the wheel base and your wheel width, that can show you what you’re up against.
The newer engine placement isn’t going to mate right up with (you didn’t say)an older AD truck front end, engine compartment and radiator support.
Cross members, steering column, box and pedals will need a lot of head scratching too.
No one here will tell you it can’t be done, if you know how to Fab, weld and design what’s needed.
Define what you want out of your old truck; that can help point the direction your project will go.
Our 6.0Ltr engine, 14 bolt rear, going with a 4x4 dana60 front, pointed our project direction to re-frame.
Good Luck with your project, have fun and enjoy the challenge.
