If you want my honest opinion on the matter, I would stop right now and get rid of those eBay coilover sleeves.

If the manufacturer can't be troubled to print instructions, what faith can you have in the engineering of the sleeves and springs? Did they even mention the spring rates?

At the very least, upgrade your shocks now ... so you won't have to disassemble the whole setup again when your OEM shocks blow.

Also, $10 says the lower spring perches corrode or bind within 3 years.