OK Most full length subs won't clear stock Hpipe. No big deal if your going with an offroad pipe but in your area do you have echecks? And Since you mention cats in your first question I guess you have emissions.
OK if no Echecks, Full length subs. Now most say go ahead and do full length headers. Well I couldn't get 1 single company to Guarntee that I would still be able to drop the tranny without dropping the long tubes. So I'm putting shorties on this winter. Most people see 10-15 hp across the board with LT's and 5-8 with shorties so the 10hp loss but still been able to pull the tranny is worth it to me.
Gears. 4.10's unless you plan on Racing on the interstate. I knock down 24+mpg on the highway. Only real downfall is I have to shift into 5th before the traps on the 1/4mile track when spraying. and get FRPP gears you and your installer will be much happier also I would get the master bearing kit and do it at the same time.
Shifter MGW I love it. I adjusted it to where when my hand comes off the wheel it is on the shifter no reaching.
Midpipe - is too personal a choice. I like Hpipe's but have a prochamber due to I got a good deal on it.
Catback - I'd just weld those flows in and call it done.
Pullies - Sorry can't be any help here.
Programmer - I'd get a handheld. I'm going xcal2 just because there are 2 real good tuners that use SCT within 2 hours of me. Plus for racing the 2 step is cool as can be.
Plenum&Tb - well if you got the coin sure. Although if you shop around you could prolly pick up a good used nitrous kit for that price
