Welcome! I can help you out. I used some adapter plates to mate the engine mounts. The rest is not to bad. You will need to install an electric fuel pump and do some wireing. I used the electric cooling fand from the camaro to cool the radiator. I had to modify the passenger side engine mounts and exhaust manafold but if you don't want AC then the swap is quite a bit easier. This how mine went. http://forum.ls1truck.com/index.php?showtopic=289
2006 Superior Blue Trailblazer SS AWD, Stock as a rock
Sold: 2002 GMC Sportside Denali front end with a 2002 LS1, FLT level 5, Yank 2600, Trick Turbo, T76, Nelson intercooler, 60LB injectors, Warbro fuel pump, Eaton locker, Magnaflow, 3.42, Nelson Performance Tuning (speed density).
Sold: 1981 GMC LB RC 1500 2002 4.8L 4L60E 12 bolt 3.73 Richmond Lock Right AC PS Nelson Performance tuning