Am I nuts? 1940 Plymouth Commercial Car (Truck)

I just discovered this thread. Awesome project and one that is definitely on my bucket list.

I always thought a firewall swap was the way to go, but I'll admit that I underestimated the challenges.

I'm trying to wrap my brain around the geometry to understand why you had to move the engine and cab back so far. Not sure if it's possible, but if you could explain that better, I'm sure it would be interesting to others as well.

Also, what made you decide to go with the A-body heater box and/or vintage air instead of the Dakota stuff? Was there not enough room behind the dash?

Thanks and good luck with the project, and keep the pictures coming!