Maybe cars that run on crank angle sensor that are tuned on MT/LT-4 have the option to do ignition timing as i have tried it on my civic-r turbo. You can ask around if your car runs on distributor and can lt/mt-4 do the ignition timing.
Im seriously considering on getting an FD , so far the fuel cost isnt whats concerning me , just the maintainence and the know-how of keeping the FD in real good condition ... and how costly is its real maintainence...