We just bought some adjustable coilovers and we are installing today. Having problems: There are two different spring sizes on each coilover, one heavy duty one and a thinner one. Two of the coilovers are marked "0700.2.75.008" which i'm geusing is the spring rate. The others are marked "0500.2.75.010". The overall height difference is about 1/2 inch. Which ones go on the front and which on the back? Please if you have any ideas post back a.s.a.p.