I guess your confusing me with calculation versus a measured spring rate.

You state the long spring is rated at 175 lbs per inch. I really doubt you could hang a 175 lb weight on it and not have it come apart. This is in the range of Valve springs.

The spring is slotted to allow the lighter spring to control low rpm advance. Higher rpm with greater centrifugal force from the weight and a slower rise of advance required to get to total is where the heavy spring comes in.

I never measured them but I do have a distributor scale for point setting, and an old larger scale for heavier objects so I guess I will do a pull test to see the rating.

Are you sure your not missing a decimal point and it is 17.4lbfs/in. The light spring is only 1-2 lbf/in.