75 z, want to swap my 4 speed for a 5 speed, best option?

[Zed Head]

You can change cruising speed with a different differential.

 

On that topic though, be aware that 1975 has an odd bolt pattern on the differential.  So if you do swap differentials, you'll need to get a 76-78 propeller shaft (center driveshaft).  Or swap pinion flanges.

 

On the wheels - it's tire diameter that matters.  A "normal" 14 wheel can have the same diameter as a 16" wheel with a low profile tire.  http://www.discounttire.com/dtcs/infoTireMath.do

 

On transmissions - many people focus on cruise but they should really focus on 1st gear.  

Edited November 2, 2015 by Zed Head

[Taxelson]

Zed, good point on the tire diameter. Thanks

[SteveJ]

Mud,

Thanks, that link didn't work, what's the name of the book, I'll get it ASAP. I'm on the hunt for an 5 speed. I think part of the reason I'm looking at a 5 speed, the car I bought has 14" wheels, maybe it would be a more comfortable RPM at cruising speed with some 16" wheels, right? I think I'll buy the rims, tires first, then see how comfortable the cruising speed is. Sound good everyone

Try this link: http://www.amazon.com/Rebuild-Your-Nissan-Datsun-Engine/dp/1931128030/ref=sr_1_1?ie=UTF8&qid=1446502999&sr=8-1&keywords=how+to+rebuild+your+nissan+ohc

[Taxelson]

Thanks, it's ordered, excellent.

Troy

[Bruce Palmer]

Troy,

Just to confirm what was stated here-in the help you can get here is far and away the best you can find anywhere on the web.