Anyone try longer fork on Pivot Shuttle AMP'd? LT vs. AMPd?

Really torn on getting new Shuttle LT or the Amp'd. I've ridden both but only in parking lot. Normally ride a 170/165 Firebird for enduro trails and steeps, but I do like the Avinox 2 motor in class 1 mode of the Amp'd -- but it's obviously 160/150 even if fairly slack and aggressive geo.

I so wonder if anyone's tried a 170 fork to it. It'd still be 150, but plenty have had success on analogs. Pivot says 160 max. Not sure if that's mostly marketing/positioning statements. Anyone else torn? Thoughts?