if your looking for an air/fuel gauge and a few other gauges for a N/A truck for now, i would definately recommend the interceptor gauge. i myself dont have one, but i read up on the ones allen was selling, and jethro showed me his.

a while ago allen had about five for sale, you might be able to contact him to see about purchasing one. a few guys on here have them, jethro, allen, i think gmcwantsls1 and SC, so you can ask those guys about the functions. but its definately worth the money instead of buying seperate ones.