1968 Chevy Nova console guages

I am building a SS Nova. This car was a 6 cyl. auto. I put a Big Block and a 4 sp. The problum is the car had ediot lights.I waunt to install guages on the floor concole. I have every thing new also have the wiring pigtale.I can not find a place in the harness to plug in the one for the guages. I bought all new harness for the engine comp. for the guages. If you can help me let me know.If their is a ph. no. i can call if you like to discuss this with me. I did not change the dash harness it is still the original one