You're right Mike but the question remains... just how fast can a house brick fly?
I have the option of swapping my Skyline 4.11 centre with 3.89 diff + axles from a 200SX.
Also Mal Wood offers custom gear sets... check out the available ratios under "Cobra's".
http://www.malwoodauto.com.au/
I get confused at this point... which of those options would make my 0-100kph drive ratio longer using the 4.11 diff?