I am gonna replace the spark plugs on my GP. any tips? I think im gonna go with NGK t55 spark plugs, maybe go for the iridium ones. i know the front 3 plugs are easy to get at, what about the 3 in the back? are those pretty easy to get at too? thanks

No, they are a pita!

If you are familiar with changing plugs they aren't so bad.
You know... There is an angle, and a feel for putting them back into place.
If you want to make it a bit easier, you can roll the engine forward by disconnecting the top motor mounts and pulling the engine forward. the RH mount has an extra hole in it to slide the bolt into. This will give you a bit more room to work with.
(edit - removing the wires can be difficult...... get a full twist on them to break them loose before trying to pull on them)

If it's your first time changing plugs on the wonderful transverse 3800 do yourself a favor and roll the engine forward as Clint suggested. Also, buy new wires. Chances are they could use replacing anyways, but more than likely you'll damage one or two of the back ones in the process of removing them.

Have anti-seize and dielectric grease available so you can prep the wires and plugs so everything will pull apart easily next time around

Take off the motor hoist brackets and toss them under your tool box.
It's really not that bad of a job. I did mine last year and it turned out not to be as bad as I thought. The hardest one to do is the back drivers side. The O2 sensor is right up next to the plug... and speaking of O2 sensor, while you're back there you might as well change that too.
Do as posted above... roll the engine forward and lock it into place, twist the boots don't pull.
You should be fine.

the first time i changed them last year i did it in 37 min!! not to shabby for the first change in a transverse engine

I was able to replace mine in the back easily because I have such small arms! lol It only took me about 30 min. Also one tip is to buy the pre gapped plugs if youre lazy like me

your so luckey, i have the big fat clumsy arms.

Hmmm... take your time. You'll probably get some scratches on your arms.

BTW... don't waste your money on Iridiums. Stick with the TR55s.

Check the gap on pre-gapped plugs just to be sure. It's not uncommon to have one or two in a box out of spec, I guess due to shipping.

Brings up a good point... are you going to keep the gap stock?

I ordered some copper core NGK's this afternoon, along with front O2 sensor, PCV valve, and some ceramic pads for the front.
I was planning on buying all this stuff local, but I really was able to get it cheaper by ordering over the internet.
Plugs and Hawk ceramic pads form PFYC, PCV and Mobil 1 oil filler cap from Ultimate Warrior, O2 sensor from W Body store.
Now instead of getting all this done on Monday, I have to wait until it get's here and I should be getting it all done next weekend.

so to pull the engine forward just use like a rachet tie down or something?

Yup. Be sure to take off the dog bones to tilt forward.

Use one of the bolts from the dog bones to hold the engine forward. to rock the engine forward you can push the car back with your knees, or pull the engine forward.
The front plugs are easy, the back ones are not too bad. If you are removing the stock plugs, expect that they will be a royal pain. Just be persistant and you'll get them out. The worst plug (as mentioned above) is the right rear one. The first time takes the longest. After that you can do it in 15 minutes. Also make sure to get some plug boots for your new plugs (www.summitracing.com has the taylor boots in different colors). I got the red ones to go with my MSD wires