Is it necessary to keep the Stock gauge cluster hooked up for proper engine tune? Ill be swaping a 3rz in my first gen in a couple of weeks. I only want to keep the wiring that is necessary to run it as a stand alone harness. I will keep the OBII intact as it is very easy to figure out what is wrong with the engine with a scanner. Will i need to install a VSS? Any help would be appreciated Thanks
