NOS Super Power Shot or Nitrous Express Hitman Plus?

Thanks for the info. Just have a couple more questions...
What programmer would you recommend? By A/F gauge, do you mean the one that has O2 sensors plugged into bungs on each header collector? I'm assuming the retard switch plugs into the ignition box, is there a specific box you'd recommend? Thanks, hope to start ordering parts next week.
For sure.

I have the Maximizer 5 for a programmer and a MSD retard switch for the timing. They're about $150.00 on Summit.

Edit: Here's the module MSD Ignition 8676 MSD Retard Module Selectors | Summit Racing

AFR gauge: Correct. You can also use a single bank style as well, but I like to see both banks. The gauge I use is made by Innovative Motorsports. It's spendy but worth it