Finally the decision has been made.

dartfreak75 said
Yea that is what I am researching right now! You read my mind lol I am doing alot of reading and studying about springs I plan on starting a new thread on the topic but I am reading up first so I kinda know what I'm talking about.
What I gather so far. Is the bind height is the max effective lift. So for example if my installed height is 1.65 the bind height is 1.1 the max effective lift for those springs will be .550 then you have the spring rate I'm still researching that

You need to add about .060" to the available compression to allow for some clearance to coil bind at max valve lift.

Spring rate is easy to figure:

Take the listed seated pressure and installed height and compare to the open pressure and that corresponding height
Subtract the seated pressure from open pressure
Subtract the open height from the seated height
Divide the difference in spring pressure by the difference in height
The result is spring rate in lb's/in
This applies for any 'straight rate' spring, i.e., a standard coil spring, including singles and duals, with or without dampers. (This does not apply to behives, which are progressive rate springs.)