Okay,here's an Idea.
I was thinking about a van I saw. Then it hit me. Certain lines on the vehicle brought this idea up. Take a 1960.Chevy. Cut it lengthwise and remove 1/8" lengthwise. Now, cut it again and do this. Shorten the distance between the rear wheel and the door. Then behind that shorten the distance between the wheel opening and the rear bumper. Don't forget to remove the drive shaft tunnel inside!
Modify the chassis to carry the new body. take the engine place it sideways with a Toronado or Caddy El Dorado FWD and stuff it in there. Just a beam axle in the back. Now for the front. take the light pattern from a Toyota Truck and fit the end of the fenders with those. Lower the hood edge about half the heighth it was keeping the lowered central part of the grill. Take the back wings and fill the groove under them till they are just a shadow of their former selves.
Take the rear and do the same, running the Tail-Lights along the edges of what was the fins. Keep the pattern.Then blend both the Front and Rear bumpers in like the bumper shrouds like the New cars. Might look funny.
But, if done right might be prettier than some of the blandness we see out there. A Brand New 1960 type 2021 Chevy Impala! Well Shoot, It's just an idea. You could use a glue Bomb to start it.