gauges

ight guys i got all of my gauges in, bout a 3-3/8 speedo, 160mph , 2- 1/16 oil psi, water temp, volts, fuel level, and a 5" tach. so, im gonna have to build all the gauge pods for this. but before i start building, i just want to know, are their anymore gauges any of you guys can think of that i might want to get? i have no boost, someone said a/f ratio, but ive also been told they dont work all that great. i just want to have all of them, before i start building, so i wont kick myself later. any other ideas? im using the phantom line.