Parts install ?'s

I'm going to be installing a few parts next week on my '01 gt and was wondering if there is anything to watch out for. The parts are; bbk l/t, d&d 3650, fidanza clutch, accufab tb & plenum and a few others. I already have o2 extensions and I'll be replacing all of the o2's and also a new set of plugs. Any recomondations on which brand is best? Any help appreciated.

Thanks for the info, so I can just clean and regap stock plugs? I guess they only have 60k miles on them. It should go well especially if my mechanic lets me rent his hoist. Also, anyone have balance or chatter issues after machining the stock flywheel? I only ask `cause my friends ls1 camaro`s flywheel vibrates now after being cut; maybe its a GM thing