Thanks so much for the welcomed advice gents.

At the moment it's not too bad as I do have several motorbikes. I also have a ford laser and my partner has a mitsi lancer. But keeping rego and maintaining all these vehicles is expensive. Hence why I want to lean out the stables.

So far I'm leaning towards a no extra service and fine tune. Thanks Dom14 for the info on the Petronix kit. Never even crossed my mind to bring it into the modern era of efi... Which would also make throwing a turbo on easier as I read its super hard to tune a carbi turbo.

I'll look into the efi to start with thanks.
Oh and as for 5km to the L. That's horrible compared to everything I've ever driven. I think I got 250km from a 40L tank of gas... If that.