D2 Strut Spring diameters

hi.

I have measured the internal diameter of the springs that came with the d2 suspension front struts. Near as I can measure they are 62.2mm. The "collars" that locate the springs (top and bottom) are 62mm diameter. This would not be a problem, except that i want to buy springs that are shorter than the 205mm tall ones supplied with the "rally-Asphalt" kit. Springs for coilovers (etc..) are either 60mm or 65mm internal. Do you think I could use 65mm springs??

Thats Question 1.


Question 2...


The springs are:

wire diameter 12.7 mm (0.5")
free length 205mm (8.070")
internal diameter 62.2mm (2.448")
external diameter 87.6"" (3.448")

I compute this to be a spring rate of 575 lbs/inch...

any advance on that?

thanks, jimn~