Joe El Clark

Hi I have a 70 el camino I'm working on it had a sweep style dash in it I replaced the dash with a ss dash and it came with a new fuze box harness to wire the dash up for some reason I'm not getting a power to run the engine but my lights and brake lights work but no power to the engine also I put in a Muncie 4 speed not sure if that has anything to do with it pls any info or pics to help me is greatly appreciated