The main changes noted here for the existing models was an extended wheelbase for both models and the 57" track for the 150 model. It looked like the engineers were interested in getting more power to the 170 model with a V8 engine ans new style transfer case.
Along with the V8 were plans for an automatic transmission and a 12 1/2' bed with a 10,000# GVW capacity on the FC-180 model.
The next step up, the FC-190 included a tandem powered axle, a 16,000# GVW, and a 16' 10" bed. V8 power only.
As you can see here, Forward Control owners weren't the only people thinking that a tilt cab design would work out well. Unfortunately, (for most people) this concept never became a reality. As the piece states, the tilt mechanism is a spring loaded design. There is an article on the"Featured Vehicles" page that shows the main details of my tilt cab FC-150. It has a hydraulic cylinder tilt mechanism off an old cab over truck from a local boneyard.
Here's another thing that was cooking in Brooke Stevens head on the FC front. This expanded on the FC "Commuter" design. The prototype near completion mentioned above was the actual Commuter vehicle. Unfortunately for Willys, by the time things really got rolling on the FC concept front, they had to change their focus on keeping the company alive and these plans were never followed through on.
Now here's a wild idea. Provide traction to the axle of a fifth wheel trailer!
Here's the V8 that they were going to use. I believe it was a Ford design.
The T-98 4-speed did make it to the production floor in all models but the Ford design automatic never did.
The new transfer case design had an extra rear output for the tandem and powered 5th wheel design and of course the Model 70 rear end became the mainstay in the FC-170 DRW models.