R engine used in the later SPL311s  had a Wider bore and shorter stroke than the SPL310 G Engine

Here is a great photo of what the original  "G" Engine looked like. Only the first 300   had this unique version of the engine with the  Chrome valve cover and single SU  Carburator.

 

SPL310 Ad - Datsun Dash SPL310 Ad - Japan SPL310 Ad  SPL310 Ad Another Ad One More SPL310 Ad	1600/2000 Ad Poster 2000 Racer 1 2000 Racer 2 1600 Racer 1600
Promo Pictures - SPL310 Promo Pictures - SPL310 Promo Pictures - SPL310 Drawing - SPL310

• Trivia -     Did you know that the serial numbers on some 1963 SPL310 ended with the letter B.
• Trivia-      Did you know that the serial numbers on some 1965 SPL310 ended with the letter D.

The First 300 SPL310 - Where are they now????????
 

List of Datsun SPL310 Roadsters 1962/1963 SPL310-00002 - White w/ White Hard Top (actually '65)  SPL310-00026 - In the middle of complete restoration (Les)  SPL310-00082 - Sky Blue with Red Interior (Mike)  SPL310-00171 - Mint Condition  SPL310-00236B - Being Prepared for racing in Japan  SPL310-00239 - In Texas (Neil K)  SPL310-00289B - Full Restoration complete. (Gary)  SPL310-00306 - Spotted in Orinda, CA SPL310-00327 - Dan, Long Beach  Others:   Los Angeles, California     : Andy    (Vin Unknown)  San Jose, California           : Rod       (Vin Unknown)  Hayward, California          : Jay        (Vin Unknown)  North Carolina                  : Andy    (Vin Unknown)  Arizona                             : Ron H. (Vin Unknown)  Texas                                 : Richard P. (Vin Unknown)

 Check Out the Bay Area Datsun Roadster Club (BADROC)

Mike G's Fairlady 1500 Page

Alan Bent's Early Datsun Page