I eliminated my idiot lights and replaced them with factory gauges. An elbow is a good idea to get the line facing away from the headers. A better idea is to buy a kit from Autometer, that replaces the plastic line with a copper line. Some tracks will not allow you to race with the plastic line.
Here's a link for the kit;
http://www.jegs.com/i/Auto-Meter/105/3224/10002/-1
Here's a link for the kit;
http://www.jegs.com/i/Auto-Meter/105/3224/10002/-1