Thanks rusty is it quite expensive
Do you have any web links that I could read / check
Well a good start would be to check out the posts on this forum, the blitz racing link and the reputable companies for tuning. Then there are loads of Italian suppliers like 500mania etc and the 500 classic section on the Fiat forum.
Costs ? Well impossible to say as it all depends on what you want, probably about £1,000 for a basic package and easy to spend £3,000+ on an engine.