i just swapped a d16y8 to a d16y7 block with the d16y8 head and when i try to start it, it sounds like the timings off but i found tdc in the y7 and on the y8 head i put on i had the cam gear facing in the up position could the dizzy be 180degrees off or what i didnt think it would fit in backwards i dunno it started but wouldn't rev just sounding like mad timing issues what the hells wrong.............oh and it has a homemade turbo kit on it too 450 injectors............