I currently have two Ford style front leaf spring packs in my stash. One is what I think is a stock model A spring pack. The other was sold to me as a Posies spring pack from a 34 ford (it does have reversed eyes on the main leaf).

Anybody have any guesses as to how close the spring rates might be between the two? ...and what the rates might be?

Anybody have a guess as to how much the spring pack will compress from free state to being on the ground with a 575 lb motor behind the spring?

I am going to use the transverse spring to hold up the IFS set-up and don't really know where to put the spring crossmember.