http://mcasuspension.com
You want to talk to Josh, Murry's son.
Josh has done a couple of of Zeds now and I have driven deusex,s 240 with them onand there a nice thing.
He will let you pick what ever spring rate you want.
redblue@mcasuspension.com
Is Josh's email, just tell him Doug mentioned him to you and he will know what your after.
Cheers Doug