No, don't cut all 1.5 coils off in the beginning. Reread the post, cut a half off an reinstall drive it and check it. Springs settle in different ways, so what one spring will need will not be the same for another. BTW, I personally don't recommend lowering more than 2" with springs. If you need to go lower, get spindles and your ride want change, the general alignment shop will be able to align it also.