Instrument Cluster Voltage Regulator

That heat sink in that kit looks to be a bit on the small side. As NM9 points out that heat sink will be dealing with 4 or 5 watts at times. It would take a lot of air flow to keep a sink that small cool. On the capacitors, 1 MF capacitors are below the values needed to keep the LM-317 stabile. I would go to at least 10 MF. Also, if you use tantalum types they should be rated for a least twice the voltage they will see in the circuit. Tantalums are very fragile when it comes to voltage spikes, conventional aluminum electrolytics are much more rugged.