TXZ

EricB, if you highlight the ratio window in the calculator below and type in your own rear end ratio the calculator will give you the desired result. It's a good idea to double check with your own calculation, however. http://www.geocities.com/z_design_studio/

Here's a link to a handy calculator specifically designed for the Z. It's great for trying our a variety of what-ifs with transmissions/tire/rear end/ and engine redline combinations. http://www.geocities.com/z_design_studio/

Yes, there are a lot of the gear reduction starters in the junk yards. Most of them are rebuilts at this point, but I found a relatively new (at the time) Nissan rebuilt unit and it has worked flawlessly for years.

The Datsun gear reduction starter with the addition of an adapter is used as the preferred retrofit for high performance Amercican V8 motors.