One thing that may need researching is what wheel / tyre combo is fitted. I don't have the details handy but some mid 80's Ferraris came fitted with Michellin's "new technology" TRX rims & tyres. They use a unique tyre mounting on the rim, and so cannot accept any other tyre (that I know of).
Unfortunately, the TRX concept didn't fly, and the TRX tyre has not been further developed with time. This severely limits what new tyres can now be fitted (ie, only TRX ones :ugh: ) unless you replace the rims with a conventional set of 16" wheels => very expensive, so check it out first.