got the 12si 94 amp GM alt in my trackick today, no pics (none needed really), here are my comments.

the alt came with a pulley for a 5 groove belt, after install the stock 4 groove fit just fine on the pulley without shimming or using a 4 groove pulley.  used the T T alt bracket.  not as heavy as i would like but seems to be working just fine.  make sure you keep the plug that comes with the alt to hook to the stock wires if you (i recomend) go with the 3 wire hookup.  stock battery wire from old alt works for the new one.

had 2 problems.  1st the alt is so big that i had to remove the pipe in the lower radiator hose and cut the bracket off of it.  was going to buy a longer rad. hose but this worked alowing the alt to just miss the hose on the back side.

2nd and worst.  the adjuster bracket for the stock alt WILL NOT work.  so i just made 2 little plates w/ holes drilled 1.5 inches apart and raised the right side of the arm.  long enough to get it done and short enought not to let it move all over the place.  seen better ideas, but it works and only took 10 min to make

had to buy a new belt, it is 33.5 inches long.  prob could have used a 34, but it workes.

Alt. works great!  will try to add a pic to my site and repost her later this weekend or next week.

Congradulations!

I look forward to doing this myself.  Look forward to seeing your pictures.  I have a file going and will add them to it for when the time come for me to do this upgrade.

I just finished putting one on my small sammie last weekend. I had one on my other one before but this one seemed a little different. It actully made the car run a little better. I think the stock one was on its way out, and the higher voltage of the properly working alternator makes the spark plugs happy. I used the trail tough lower mount and made my own upper.