Will the two play nice together?

 

I had a Bullet, it's top power is 60 HP, I feel like the Smarty alone will be a better choice. But if you use the Bullet for the gauge alone, then keep it. The egt gauge will be the only one that will work because the Jr boost fools.
I hope this helps.

 

This site here http://www.pickuptruck.com/html/news/banks.html says it can be stacked with any chip or tuner. Looks like it adds fuel to get the power levels up. I have a diablo puck and it adds fuel and timing so I have to watch what I add to it. That's the only thing I was thinking about the Banks when I first read your post, but if it don't do timing, meaning you don't have to programmers on there trying to do timing it'll work and according to that page it is stackable with anything so you should be alright.