front 3/4" is the most you can go with stock diameter tire, I was able to go an extra 1/2" cause my tires are 1" less overall diameter... for maximum drop you'd have to use a shorter tire... if your willing to use a 29.5" tire then you can do my setup & do 1 1/4" front strut mod. variying diameters you can add or subtract from the 3/4" baseline at the ~30.5" stock diameter. what size tires are you running?
check pelons results, from what I see the eibachs are low enough in the rear that you can just drop the front with the modded struts & that's it, judging by pelons measurements he looks like he's got nice rake as-is... maybe it could use to come down though very slightly too, we really need a good shot of pelons stance as a reference here, if you get a chance pelon a few 3/4 shots & a side view would be helpful
if you do the lower seat as upper then it will probably go back to having a low ass & sit at the same angle it does now & not have a rake. might be a case where a slight spring seat adjustment would be better. basically what were doing is adjusting the stance just like a set of coilovers would allow, but without the convienience of having the adjustments... I'd do the front then look at & measure the rear to see the stance...
wanna try something experimental that I think should work really well & make the handling & ride really great? use a rear h&r spring instead of the eibach rear, with the upper seat replaced with a lower , then the same coilover I have now in the rear as the shock. I think that combo would be perfect with a stock eibach spring in the front & a 3/4" strut mod to a new kyb strut.
should ride like my fx does now but just not as low by about ~1.2" total. handling is way improved since I did the rear coilovers, the rear feels dead solid but comfortable, should be a pefect match to the front eibach. if you tried this with the rear eibach though I think it might wind up a bit too stiff in the rear.
I think that combo should wind up around the perfect height, but since this is not 100% confirmed keep in mind that after this setup you may need to make a minor height adjustment in the rear too to get a perfect stance, which would probably be best done by then modding the rear lower spring bucket at that point. were talking tailor made suspension here though

I wish you could feel my fx now, before if I traveled at 40mph in a straight line & then cut the wheel quickly left & right, the whole body would kinda sway slightly right then left & return. now, if I do the same, it's wild how it just feels like the front just goes left or right without affecting the body much at all, it just turns left & right with no roll. the steering feels much more precise, the whole thing feels more stable....