it'll be easiest with the starter out of the way. if your useing a tourch, be VERY careful of your firewall gromet on the passenger side. have water handy as always.
you dont really need a swivvel for the passenger side if you get the starter out.
best way to get the starter out is alot of extensions,(edit and swivvel) slid in from infront of the crossmember, and the top bolt is a female dog. ive heard you can use a bunch of extensions for that, going right along the manifold, but i made my own 5 15/16th's inch extension, with either a deep well, or standerd socket,(cant remember) and slid it up between the starter and k member. you'll see.
best way tho, is to use a tourch, pb blaster didnt help me much cause i didnt even try, and pb blaster sparyed twice a day for a week straight broke studs on my buddies 03 gt. i used the tourch with flawless completion, other then my gromet is now gone, but thats cause the tip on the tourch was too big. useing a smaller tip woulda saved it tho. and watch for melting vaccuume lines. didnt happen to me, but i kept a close eye.
all i can say is good luck, and your gonna love the results.
p.s. leave the top starter bolt out. it makes for really easy matinence on tightening your flange after a week. the top bolt IS pointless. mines been mr 2 bolt for a year now.