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More for Less Racer
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If you understand how the Cal-Trac bar works, you would realize what you have drawn up won't work.

What the Cal-Trac does is turn the leaf stack into the upper bar of a 4-link, while the Cal-Trac bar itself is the lower bar of the 4-link.
The front triangular rocker pivot directs force back into the spring leaf just to counter the springs own natural tendency to bend upwards under power application right behind the front eye.

The front rocker pivot was just an ingenious way of allowing the front of the bar and the spring eye to have separate pivot points to prevent binding up during suspension travel and not just making the suspension super stiff like the old fixed location front mount on the Traction Masters developed in the 1950's

John Calvert's brilliance was figuring how to use some of that force put into the lower bar to also control the spring wrap.
It is the mounting point of the front lower bar that uses multiple holes to get instant center adjustability that is the most important aspect of the bars ability to work.

If you want to see the adjustability carried to the extreme, look at Smith RaceCraft Assassin Bars
 

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More for Less Racer
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20,945 Posts
If you can get the ratio worked out to match vehicle weight and rotation around the pivot contacting the main leaf at it's weak point ( 1/2 way in between spring eye and end of next leaf in the stack is a good general point for multi leafs), then the last sketch layout should work.

Have you thought about something like a flipped over Competition Engineering Slide-A-Link??
It is similar to the Cal-Trac, but more simplified at the spring eye and main leaf clamp end of the bar.
 
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