I need help! Legally modify commercial truck?

Hello all! I am new to the forum but have been reading a lot. I can not find any legal information on what I am trying to do.

My question is can I legally install a newer, custom cab on my medium duty truck?

Backstory and info:
I am a welder/fabricator and started working on a 2001 F650. I have built a 8 door "super truck" cab for the F650.

I currently own the 01' F650 and an 84' international. The cab on the international is GONE. Not repairable by any means. However the frame, drive line, and everything else is perfect. The f650 is essentially the opposite. However I can not install the 84' stuff into the 01' chassis due to regulations I CAN find. Lol

What I want to do is put my custom cab from the F650, onto the international frame, but retain my registration for the international.

I see no regulations stating I "can't" repair my truck this way. And want to know if I can get away with this legally, and still be able to explain myself and pass an inspection.

I know this is probably the most expensive and backwards way of doing this. My question is not if it is practical. But rather, if it could ever be legal by any means.

I know the newer "CV" line using a GM cab. If international used a ford cab at any time, I would simply be "updating" my cab.

Thank you.

 

I am in GA. They are both diesel. 01' Ford is 5.9 Cummins. 84' international was originally dt466. Has mechanical 8.3 Cummins in it now.

Planning on commercial use until I can purchase a semi. 2-5 years.

Also I have receipts and titles and can take pictures to keep if that matters at all.

Thanks!

 

Also after i am in a semi, I plan on keeping the truck as a personal to haul my jeep/drag car/other toys/camper around. I never plan on selling or getting rid of the truck.

 

Maybe a rebuilt title? That wouldn't bother me too much.

Chinatown it would be. Just a different "sitting area". This is essentially along the lines of a engine swap. Same platform but different make. The gvwr of both trucks are 2k apart. So essentially the same truck. International is higher. At 28k lol. Baby trucks.

 

Okay. The only contact information for my local DMV I can find is an email. I will shoot them an email laying out what I'm attempting to do. The tag office was unable to help and left me on hold. I'm sure they were very confused .

In other states I am reading up on "reconstructed" vehicles and seems to be close to what I'm doing. However it is stated the year model of the "reconstructed" truck will be the year it is inspected and assigned a new vin that doesn't reflect anything from the vehicles used to assemble it. ...

If I were to be able to do the same in GA (don't really want to) and my year was "2021" would I not have to have a 21' or newer engine for epa purposes? Or since it was assembled mostly from an 84' international can I still use my mechanical engine and no ELD?? This is very confusing.

Also, with a "reconstructed/assembled/rebuilt" title will I have big issues getting insured and operating commercially?