8386 Ferrari F1 Racer convert to an RC
If you are looking for direct instructions converting this set to RC you won't probably find it here. It is just a big of a job for such a simple request.

However I could suggest placing PF Servo motor where the steering wheel is and PF L-motor where fake engine sits. You can probably fit smaller PF battery box in one of the side covers with fake radiators. And PF IR-receiver can be placed wherever it is convenient. Don't forget you need PF remote control to drive your model. There shouldn't be a need for extra gears if motors placed in suggested places.

I can also suggest to try converting such set to RC on your own. It has plenty of space, a lot of potential to gain experience and shouldn't be a big of deal to convert. It might not look great on the first iteration, but with a bit of persistence and more practise you can make it look much better.