First off, congratulations =o) Shame on your for not switching over to 93 octane *before* doing the install! =oP Now, as far as pistons, you can expect to pay around 500 bucks. I know HRC is selling pistons and I believe I hear someone that bought a complete piston/rod/rings set for like $1160. Yeah, you could use stock rods, just have the shot peened and they'd be good for the 350hp range. Although, if you're gonna get real serious and swap internals, it doesnt make much sense not to swap the rods too. As far as doing it yourself, I wouldnt try it unless you've rebuilt a motor before. The cylinders need to be honed and the ridge cut out, and that requires machining. That answers your other question, the entire motor has to come out. It needs to be cleaned and prepped as well. Yes, you'll need head studs, gasket, seals, etc etc. Also, what kind of oil are you running now? As far as blowing up your motor. Watch your gauges, dont overboost and make sure you have no vacuum leaks. 93 octane should be sufficient. Did you get an EGT gauge? If not, definitely get one with a high quality probe and watch those temps. Those temps are even important on n/a cars. I was at Shaun's (lbcgear) house last night and he was telling me that he watches his egt regularly and his car isnt turboed yet. Just play it safe and keep an eye on things. One more thing, have you had your compression tested? If not, definitely a good idea. Anyhow, happy boosting and good luck! =o)

91 awd: 60-1, 880's, E-Prom, etc.
93 awd: JDM 6 bolt, K&N, full exhaust, Wally 255, otherwise stock.

R.I.P. the original "Factory Freak"
15.5's with short ram and catback only
1996 RS 5-speed