Ok after pooring over post the last few days I have seen where some folks have used PAC/Scosche line convertors with sub box installs but also read where they donot work when adding for front speakers and Soundbar.

Here is what I am wanting to do, Keep factory 430n upgade all 6.5's and tweets but still use factory amp.
Upgrade factory Sub keeping factory amp in place in case I remove speaker box for Top off/summer time - Any suggestions??
Install sub box with amp tapping into factory sub wiring via PAC/scosche line convertor - what to use and where to tap into???