Your probably thinkin mixed engine? Well yes in a way i have a D16a6 head on a D16z6 block but anyway i cant get a timing belt to fit on it, i have the a6 timing belt with 107 teeth and its to big and then i got 1 for the z6 cause i heard that should work and it has 104 teeth and its just a little to small so i need 1 with like 105 or 106 teeth but i have no idea what engine thats for and autozone dosent count or have any idea, same with every othe auto shop in town, so chould someone plz help me here, and thx a head of time