3sge 3. gen. tuning Options

[TARManiAC]

Hi. I´m about to do a complete overhaul on my 3. gen 3sge. Bearings, toothbelt, seals, gaskets, and pistonrings. And while I´m at it I thought, hey why not have
some fun at the same time. So now I got St205 brakes and a s54-06d gearbox waiting for installation too. It´s making 188 hp on 95 octane (we have 98 in this
country) with a decat and KN panel filter + an alu lightweight crankpulley.

I ´ve done a lot of research on this engine and I think I have a pretty good Picture of what I want. I´m going for re-shaped cams, a good maschinist shop will make
them into 264*. I´m going to up the compression by shaving off the head, install a Fidanza flywheel, make a cai into the oe box along with supporting mods like
Magnecor leads a wideband lambda sensor and perhaps an adjustable fpr or high capacity fuelpump. No piggyback or standalone at the moment, but it is on the list for future mods.
My thoughts are:

1. how much can I shave off the head? I once read somewhere (can´t find it anymore) that 1mm is ok. My concerns here are mainly detonation,
but also piston/valve contact (but I don´t think so as this engine is a non interference engine), and cambelt slack.

2. will the oe green injectors be able to deliver enough fuel? I don´t know how much they are rated at.

Thank you for reading