Build it like your gonna beat on it. You'll feel better. The more power you add the more your gonna want to run it hard. I have whats in my sig and the tranny hasn't missed a beat with over 20 passes and some serious street abuse. If you know your not gonna go boost launching and stuff you can save some money by leaving the stock shafts in, but If I were you I would atleast do a billet input and a laminated flexplate. if you don't plan on running a large charger (64 or 66) down the road get a good tight converter. Mine only drops 200 rpms when going into lock-up. Thats how tight it is.