1964 1/2 1965 1966 HiPo 289 K Code Engine

The early HiPo (High Performance) engines were first offered as an option in June, 1964.  Early HiPo engines had a 5 bell housing bolt engine block.  Some of the other characteristics that set this engine apart include the following:

• Solid lifters and flat tappet camshaft.
• Autolite 4100 4V 1.12 Venturi carburetor with a manual choke.  Some K Code engines used a Holley carburetor with a list number of “3259” (these Holley carburetors were often used in Mustang Shelbys) .
• Cast iron header type exhaust manifolds.
• Autolite dual point distributor (later HiPo 289 engines used FoMoCo or Motorcraft dual point distributors).
• Cylinder heads had screw-in style rocker arm studs and a recessed pocket for the valve springs.  All of the cylinder heads had a “19”, “20”, or “21” casting number on the front or rear ear of the head.
• Heavy duty connecting rods (these were the same as the ones that were later used in the Boss 302 engine).
• Larger diameter alternator pulley.

Mustang 289 HiPo K Code engine production was discontinued after 1967.  The 1968 Mustang J Code 302 4V engine took its place.