anyone got any advice on gages? i want to add a fuel pressure and vacuum gage (for tuning) under the hood, and probably oil temp and pressure and vacuum in the interior. i see lots of stuff on the internet, but no clue about quality, etc. also need a tach, i guess steering column mounted. NPD sells the dash-pod, anyone try that? i know somebody's made mistakes in this area before and learned from 'em.....