Coil over suspension

[Big Dawgs 86]

I’m thinking of investing in a ride tech coil over suspension system for my 1986 Chevy c10 Stepside.. I have a 4/7 drop on it now spindals, springs up front and flip kit and one leaf spring removed from the back.. I expected a better and smoother ride out of this kit but truck rattles and bottoms out and slams pretty hard when driving... are these coil over suspensions a night and day difference or just hype I need honest feedback before I spend big bucks and end up disappointed.
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