A while back Greg & Torque mentioned progressive shocks as being 1 or 2 dampers. I recall "progressive" being/getting more shock travel vs. wheel travel.
Back when dirt bikes all had 2 shocks, (wow! Look a Yamaha monoshock!) about '73 or ‘74 I recall my "old school" dirt bike racing buds cutting the upper shock mounts on a Kawy and moving them forward to install longer shocks... ta...da they had "lay-down shocks".
Using the previous chart as reference, move the shock mounts such that angle AC was more acute, for every change of length "B”, "C" was required to change more. This allowed experimentation w/ longer springs, rates. (at some point the shock mounts begin to bend )

I picked up a complete swing arm on eBay. Sometime I figured to modify it for a fatter tire and lay down shocks if I can't find a shock size to work. Or being a tight-wad, just make a taller tab and fit it to lay down the existing, cheapo.
Gotta be careful, there ain't much shock to work with (the stocker).
I was considering moving the rear mounting tabs on the Savage rearward this would allow the use of the taller P shocks, lower the ride height back toward stock and make the suspension more "progressive"(?)
Oh yeah thanks for the dimensions Reelthing, and photos Rob, good info there.  8)