[Spits] Softer than stock front springs

[foxtrapper at aceweb.com]

No, a 2" reduction in coil length will not inherently result in a 2" drop in the cars height.  That 
only works out so simply in a mcpherson strut where the spring is straight up and down at the end 
of the suspension motion.  On a Spitfire, the spring is mounted a bit inboard on the arm, and at an 
angle.  You need to take both factors into account to really get an accurate estimate on drop.  Off 
hand, I'd expect a 2" coil reduction to produce more like a 3" car drop on a Spitfire.

Yes, reducing spring rate by the same percentage as vehicle weight reduction is a reasonably 
accurate starting point.  There's a bit more to it, particularly the rebound frequency, but you 
probably aren't interested in that aspect.

As for suppliers, any of the shops specializing in smaller coils can provide them for you.  Even 
places like Jegs will have them.  All you need is the diameter, which I can't remember at the 
moment.