Hi all,

I have an aluminium 1968 911 engine, type 901/13. Originally these engines were used in combination with the sportomatic gearbox.

If the engine needs a rebuild, I would like to change it to S specs from 1967-68. What do you guys think that need to be changed?

  • Pistons & Cylinders
  • R901.104.305.02 911S heads for the correct size valves
  • A counter weighed crankshaft
  • S rods
  • 002 yellow tag S distributor
  • Changed Weber IDA or Weber IDS carbs


Would these be the most important changes to the engine? Or am I missing things :-)