You will have to, must should I say, get pulleys and brackets from an LS1 based engine. You can go to street and performance, www.hotrodlane.cc, for custom pulleys. They also have take-off assemblies. I am running the f-body pulleys on my 92 c1500. If you use the f-body pulleys you will need to buy S&Ps passenger high mount a/c bracket and idler pulleys. Also, motor mounts adapter plates can be purchased from S&P or someone on the site here has a drawing where you can make your own. As for wiring, I would get a 99-2002 harness. Don't use a 98 harness, you won't have all the tuning options. Many places make a good harness, S&P being one and Painless wiring is another.