Andrew, to make it simple:
The car you mention (as with all 250 LMs except for the prototype s/n 5149) was built with the 275 engine, but was officially called the "250 Le Mans Berlinetta" in an attempt by SF to homologate these cars as modified 250 GTs (as had been accomplished with the GTO), hence the odd serial numbers assigned to the cars as well.
The car you mention (as with all 250 LMs except for the prototype s/n 5149) was built with the 275 engine, but was officially called the "250 Le Mans Berlinetta" in an attempt by SF to homologate these cars as modified 250 GTs (as had been accomplished with the GTO), hence the odd serial numbers assigned to the cars as well.
