I'm Cummins swapping a '74 Duster, thought I'd share the progress.

Absolutely no different than the C body guys that get mad at me for paying for a c body to derby it...it was for sale. I bought it. It's mine I can do as I please. And then I give away and sell the good useable parts to keep other good cars on the road. At least he's using a Cummins not Duramax or powerchoke. It will be set back far enough the unibody can and will be reinforced with a heavy trans crossmember. By no disrespect but it's easy to tell on this thread that most people have never done any major alterations to a car or any modification of any degree other than open a box and bolt a part on. He will have a fabricated trans tunnel which will be a major point of strength. He's not affecting the rocker panels which is the major portion of the frame structure of the car. He will have a firewall to tie the floor into the pillars. I am so puzzled at the amount of people without modification experience saying it's a bad idea. It's rolling weight that needs to be addressed and much better braking. The structure of the car will be better than factory. Even with little to no fabrication experience. If he knows how to weld properly that's all that matters.