“Stock” 24:1 ratio should be about 4 1/2 turns lock to lock.

20:1 ratio works out to AROUND 3 1/2 turns lock to lock, by my math. Is the range/angle of the actual pitman arm reduced?

Range SEEMS to be reduced. It also has a Firm Feel fast ratio pitman arm. Turning radius is pretty bad and bump stops are nowhere near the lower a arm, it's the box limiting the full turn abilities we think
MoPar Performance P4007612 kit in a factory box housing. Steering is fine, but won't turn sharp!?!

What was the intention of running a 20:1 box and fast ratio longer pitman arms. As apposed to 16:1 box.

Did you change to a longer idler arm too to match the longer Pitman Arm?

Need to accurately measure the output shaft lock to lock of your 20:1 box compared to a 24:1 box. Like paint mark a spine tooth, scratch awl a corresponding mark on the housing. The calipers involved. get measurement difference. Or maybe use an engine degree wheel. etc.

If they are the same, I would look into the clocking of the pitman arm to the output shaft. I believe the repro Quick Ratio Pitman's are not clocked. So it's up to the user to figure out.

I wanted a 16:1 ratio - the car is light, engine is setback, it's got narrow tires up front.
Here's the weird part lol
It's a C body front end. It has a Firm Feel fast ratio pitman arm, the idler arm is C body and almost identical length.
We are measuring lock to lock this weekend as accurately as possible. The pitman arm is clocked dead center of the output shaft, it's restricted turning equally both ways.. Not sure if the 20:1 kit was faulty, our install was faulty or what. Drives fine just doesn't seem to turn far enough in either direction.