Download the manual, it tells you which spacer goes where in the bracket. I bought my kit new and had to take the bracket apart since the belt was routed wrong. It's not difficult, just take your time and measure the spacers with calipers to make sure you have the right ones in the right spot. There are two bracket styles, hopefully you have the new style. The first brackets they sent out had belt alignment issues. You should be fine, they fixed the bracket issues pretty quickly so not many are out there. As the for the BAP, I would recommend the JMS one. You can run it on all the time or use it as a boost referenced BAP with a hobs switch. It's reliable and easy to hookup and it works. I got mine new from JMS for $300/shipped from their Ebay account. Offer them up $300/shipped and see if they take it. They are owned by SCT so you may find them that way. I have 3.73's and 1st, 2nd, and part of 3rd gear are completely useless on street tires. On radials it's a different story, with heat in the tires you can hook in 1st without too much issue.