[scottv]

There is a large top middle spot "empty" (I would like to add a tach there-can I just add a used GM tach here?), and a bottom right next to steering column spot also empty. I have an aftermarket (AEM) wideband guage-can I put that in this spot if it's the right size? I didn't know how easy it is to add non-GM gauges to these clusters. Or do I have to replace the whole cluster? Thanks!