Editing Ford small block engine (section)

===D-code===
In 1964, an intermediate performance version of the engine was introduced with a four-barrel carburetor and 9.0:1 compression, rated at {{cvt|210|hp|kW|0}} at 4,400&nbsp;rpm and {{cvt|300|lbft|Nm|0}} at 2,800&nbsp;rpm.

This engine was known as the "D-code", from the letter code used to identify the engine in the [[VIN]], and was an option on the 1965 [[Ford Mustang]].<ref>{{cite web|url=http://www.mustangspecs.com/years/64-65.shtml|title=Mustang Specs (1964 1/2 and 1965)|access-date=March 27, 2014}}</ref><ref>{{cite web|url=http://www.oldride.com/library/1964_mercury_comet.html|title=OldRide 1964 Mercury Comet|access-date=March 27, 2014}}</ref>

The D-code engine is relatively rare, as it was only offered as an optional engine in the latter half of the 1964 model year.{{cn|date=December 2024}}