The five gauge cluster I took out of the '73 worked great, so it's a shame to let it go to waste. I'm going to eBay it and hope it gets picked up. But I need some info about it for the listing. What years shared the same gauge cluster as the '73 (with the speedo going to 100)? Wasn't it '73-'78? And, technically, this cluster could be used with any truck that had the mechanical speedo, right? What were those years?