LMC used to get their drop springs from CPP, Classic Performance Products. If you buy directly from CPP it will save you some hard earned cash.
4" Drop Rear Coil Springs
LMC = $169.95 CPP = $95.00
And it looks like the drop spindles are also cheaper from CPP...
Drop Spindles
LMC = $299.95 CPP = $239.00
A savings of $136!
You might want to send those parts back, order the parts from CPP, and put the savings in your pocket.
Here is CPP's website:
http://www.classicperform.com/