Bagged or Static Drop on my 71 K5 w/20s

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here are some pics of 71 Blazer 2WD, It Has 20X10 and 20X8 Colorado Customs "Valldez" wheels with 275/35/20s and 245/35/20s.
Im ready for a suspension upgrade but I need some sugestions on this one !

Im planning to keep this set of wheels and tires But should I do front 3" JDM spindles with some 2" or 3" coils and rear is there a 7" static drop? or should I just use the 6" coils and bolt on C-Notch?

I really want a nice drop on my K5...or Should I bagged it, I already have some goodies for the air suspension like a new Blair350 compressor, selenoids, and some bags but dont have brackets, I dont have the tools to built my own brackets, so were do you suggest to buy some,
price wise is it better to bagged at this point, since I already have some parts? or drop kit?