Welcome to CHR and you are going to have to post some pictures, i'd love to see it!
Like Bob P. said, the guys at Hot Rod Works make the best conversion, i made my own and won't bother doing a 2nd one. Much better to purchase it.
When it comes to springs i prefer to do it like Bob P. detailed but Posies' sell tiptop quality springs with teflon buttons imbedded and thier engineers will get your ride height right - it'll be high initially but the new springs will settle and it'll be just where you spec'd the height to be.