Hi

I am not sure that there is a definite answer to this. It depends on your driving style. Some like to be close to the wheel and some like straight arms to the wheel. I am 5 foot 8 ish and have the pedal box 1 position from the last back position. I.e. it can come 1 position more towards me and the seat. This allows my wife and I who is slightly shorter than me to both drive. I do have my legs bent but I am comfortable enough. No wheel spacer required.

M3W, Bentley Continental 6.0 Flying Spur, MGB BGT. Beetle Conv, Merc Est, Renault Cleo.