I figure if the shocks are 14" long unloaded, and I set it 5" inward, that will give me an angle of 21 degrees, which will transfer 92% of the downward load in the direction of the shock.
If the springs actually settle down 1 1/2" under the weight of the car, it will extend that angle to 23 degrees, decreasing the shock action to 91%.
I guess the angle will mostly determine how soft or stiff the ride is, but my shocks are adjustable so I don't think I need to worry about a few percent here or there.
I think 5" sounds good.
Thanks guys.
I'll post a picture when it's done.