When the 289 in my 1965 GT Mustang was ready for a rebuild after ... A-code into a replica of the high-performance, solid-lifter K-code 289. In fact, while my mechanic and I were at it, why ...

That V-8 likely made 200 or 225 hp from the factory, though a K-code version made 271 hp. According to “The Standard Catalog ...