How exactly are the kayline soft tops installed? Is it completely bolt on or is it neccesary to drill or what not? Also what is the diff betwene the fastback (think thats what its called) and snap on? Wich is better? Also do you keep the current rear window or can that be taken out or kept down? Thanks. 87 Custom Deluxe 305/Sm465/ NP208 4.56 , 35" BFG Muds, Series 40 delta flow 3" tips Coming Soon: Suspension Work, Eaton Posi, More Exhuast work.