i was paranoid with my stage 1 on too, i have 139k on it, 10k miles with turbo. i havent had to do much fixing wise really, just make sure the HRC manifold bolts (the ones that are hex) are screwed in good (they wobble out eventually) u might even wanna pick up some manifold studs for a gst and throw those on. um besides that some things i would recommend to keep your temps down are:

160 thermostat from howell automotive
watter wetter (coolant additive, actually works good imo)
oil cooler
fully synthetic mobil 1 10w30 (or whatever)
some ngk spark plugs (bkr 7e11) stockers are 6e. 7e dissipates heat better.

INTERCOOLER!!!!!!! get the stage 2 pipes from hahn and the side mount. or just get a 1g side mount and hook that up, tons of people on here can walk u through what u need (VERY MUCH cheaper that way as well) its WAY safer to run 5psi intercooled, you dont have to crank the boost up just yet either, yet...always have the option to go 7-10 pounds. also, BRAKES. when your making a car faster start at the stop line, its safer to be able to go fast and stop then it is to go fast and not stop. of course...this is my opinion. just throw some ceramic pads on there or somethin, wont hurt

also might wanna keep your eye on your head gasket, clutch etc... those will go slowly but surely under boosted operation. bringing a non turbo motor into boost territory always has its quirks and issues...but u'll be alright, u have some of the best guys on ur side over a billion turbo kits installed i bet, lol i wonder the combined boost pressure this board has pushed into the 420a...

good luck mang
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96 talon esi-t
san clemente, ca

Uberingram> I bow down to the Geo