From 1962 to 1964 1/2, Ford used the 260 V8 engine. This engine was the predecessor to the 289. The 289 was developed in 1963. The main difference between a 260 and a 289 is the 260 has a 6 inch space between the motor mount bolt holes, while the 289 has a 7 inch space.
All 260 engines have a 5-bolt bellhousing bolt pattern. The 1963 and 1964 1/2 289 engines have the same 5-bolt pattern. The 260 has a smaller cylinder bore. Ford did not make a 260 4V engine. You can always add an early 289 4V intake to your 260 engine if you want to make a “D code” style engine (”D code” is a 1964 1/2 289 4V engine).
