Timing is 100% spot on, all I did was fit +1mm lift cams and a 156c big bore kit, I tried turning it over by hand and I can hear the valves hitting the piston, someone on another forum said he came across the same problem with the big bore kit. As he was the person that pre-warned me about the new wrist pin being bigger, which was bored out to accomdate it.

Anyone have any ideas on anything that can be done, such as maybe a spacer/wider gasket as timing isn't the issue.

Any help is appreciated.