greddy makes a mild turbo kit for the SH. you can always to a do a custom turbo setup. personally, if you're going to boost the SH, i'd opt for the jrsc. the problem with the SH is the ATTS and it's rep for not being boost friendly. it can't handle too much power. anything over 250hp to the wheels, it becomes dead weight.
the option of disabling ATTS is always there, but not only will your car not have its great handling as before, you got almost 100lbs of metal just sitting there. and we all know the prelude already has a weight problem. swapping the ECU b/w the base and SH isn't gonna do you anything. the relative difficulty in modifying the SH stems from the ATTS.
and buying the 'top of the line' lude doesn't necessarily make it the easiest to modify. yes, the base model is easier to modify, and easier to make faster. it has the weight advantage, albeit a slight advantage, but most of all it doesn't have the ATTS.
so here's my conclusion, given that the SH is easily one of the best handling cars on the road, focus on its strengths. don't get bent on being so fast going straight. hondas, preludes especially, aren't at home on the drag strip believe it or not.
. your car will eat most cars alive when it comes to handling.
you want more power for your SH? go with the jrsc. i did, i took well over a second off my 1/4 mile time. a good 70hp increase and no less than 50 lb ft of torque increase. but yeah, greddy makes a mild turbo kit for the SH if you're set on a turbo. as for the camber kit, how low are you planning to go?