We're not really going to be able to fully share your pain if you don't give us a bit more detail

Is it cranking? has it got a spark? is the spark at the right time or thereabouts? have you got fuel?is the fuel getting through to the cylinders? Have you set the valve clearances? has it got compression? Have you fitted new plugs? are the leads on in the correct order? has it got a bad air leak? is the choke operating? If it's still a crossflow then you can't really get a simpler engine so check things in a logical order HTH

oops sorry must have double posted a thread somehow!

There was me thinking what a dick until i saw the name - then just confirmed my thoughts lol!

Cheers