![](http://greeraerospace.com/wp-content/uploads/1976 Piper Lance/lance.2.jpg)
Removing most of the old Narco equipment and installing a Garmin GNS-430 allowed space in the right radio stack for an RC Allen electric altitude indicator in case of a vacuum pump failure, and a BFGoodrich WX-900. One of the nice features of the Garmin GMA-340 audio panel is that it allows pilot and co-pilot to transmit on different radios at the same time.
![](https://upload.wikimedia.org/wikipedia/commons/thumb/3/3f/Piper_PA-32R-300_Cherokee_Lance_AN1693908.jpg/330px-Piper_PA-32R-300_Cherokee_Lance_AN1693908.jpg)