Technical Abarth Timing

[Sticks and stones]

Need help with abarth timing. Could anyone please give some info on abarth timing, timing marks etc. Is there perhaps a workshop manual that I could buy? The car might have jumped some teeth on timing belt so is a non runner at the moment. I would need some info if i have to remove the head for repairs, I would need timing marks for assembly again.
Any special tooling needed and where does a person buy it?