ok i have a z6 block with a y8 head also has the z6 manifold and a z6 cam gear.....when i bought the car it was running but really shitty because they what i thought had the timing all f-ed up u been messing with it for a little while and adjusted the timing to cuz it was so advanced i set it to top dead center and now it won't start also apparently the firing order is different then the normal setup on the dizzy can someone give me some pointers on how to fix this i'm thinking of just buying a z6 head and and just installing that but idk if they messed with the harness at all...please help sorry for the noob questions i just been scratching my head at this.

 

There is no difference with the firing order. Fix that first.