Technically its a 964 C4, but they were badged '911' outside Europe.
It was balanced and blueprinted by the original owner and stock gaskets were swapped for HD metal ones. I've been fiddling with gear ratios and finally found a compromise between 'roadability' and "flee for your life" top speed (stock is around 270kph).
It runs very happily on 100LL but goes like a rocket on Elf 104 racing fuel!!
From Philip Island:
AvGas: 0-100kph 3.63 sec (1 second off stock) Top Speed: 296.7 kph
Elf 104: 0-100kph 3.12 sec Top Speed: 302.1 kph
I get the 100LL from the local crop duster who lists it as "other services" on the invoice!

The Elf costs a fortune ($35 p/l a.t.m.) but is
way worth it. Unfortunately they only make to-order and unless you can buy some from a racing major outfit, you'll have to order a minimum of 2000ltrs.