Hi, I have a 67 convertible with a 10 bolt and mono leaf, I just got a 12 bolt with multi leaf perches. Can I switch to multi leaf springs with just an installation kit ( pads, u-bolts, bushings) ? Will I need anything else? Can I use my shock mount plates from my 10 bolt? Should I switch to different shock mount plates? Can I do this without having to do anything to the upper shock mounts? Is there anything else I might not be thinking of? ( sorry, that seems like a lot of questions!) Thanks.