Frame swaps are a pain because you are putting something on it that wasn’t designed for it. Another thing to take into account is that some of these newer vehicles have crush zones integrated into the frame so they bend in a predictable manner. They are used in conjunction with safety restraint systems. Since you won’t be using air bags, be careful on what you use from new stuff. When you build stuff like this l, think about how it is going to perform in a collision event. I would just weld a front stub on from an 80s dodge as mentioned above. Just make sure you do a ton of measuring beforehand. And good, safe frame rail sectioning methods are a must! Being an I-CAR certified collision tech, I always cringe when I see guys wanting to do stuff like this. I’m not questioning your intelligence or abilities, it’s just scary how much stuff is on the road that was hacked together. Frame and suspension are a huge safety concern.