Classic Intsruments Gauges

[Nhoechst]

Has anyone used these gauges from classic intruments? My truck only came with the speedo and fuel gauge cluster, then I installed water temp and oil pressure. I have beefed up my motor now and need to have a tach and would rather have it in the cluster like this. I chose this one because Id like to have them all on the same cluster to monitor them easily. Now Id like to switch to this setup and was wondering if anyone had any comments on the difficulty of the setup it was to install. It says that it comes will all sending units, wiring and wiring for the turn signals, do you think that I will run into any problems? Any comments or suggestions would be appreciated.
This is the link to it on summit.
http://www.summitracing.com/parts/ci...ckup/year/1972

And this is the one I am thinking about getting.