One Pair 54 Cc 1965 289 Ford Heads With Machined Valve Guides on 2040-parts.com
Tampa, Florida, United States
    © craigslist - Map data © OpenStreetMap condition: excellent Condition: Used Seller Notes:"No known defects, came off running 1966 289. We may have the valves,springs and rockers in our warehouse as these were removed when the heads were tanked, if so they will be sent to the winning bidder for only the cost of the shipping." Brand: FORD Placement on Vehicle: Front Manufacturer Part Number: C6OE-C Surface Finish: bare iron Other Part Number: C6OE-E Country/Region of Manufacture: United States Compatibility What makes these special besides the high compression is they have machined cast in push rod valve guides like the high performance heads. The difference between these heads and 289 High Performance Heads is these have pressed in rather than screw in rocker studs and do not have the cups cast in for the valve springs. From 1962 until May 2, 1966, all 221/ 260/289 engines had machined push rod guides cast in the cylinder head. Beginning May 2, 1966, Ford stopped machining the valve guides and went to a rail-style rocker arm where the rocker is centered at the valve. See last picture the rail-style rocker arm is on the left. The valve cover also changed with the advent of the rail-style rocker arm. Pent-roof valve covers cleared the rail-style rockers. See hipomustang.com/images/hipoeng/ "Other than the cup the castings the (HI Perf 289 heads) were absolutely ordinary 289 4V heads. Same combustion chambers, same ports, same valves, same everything." The High Perf heads like these heads have push rod guide holes cast in the head these were standard in 1965 but eliminated in 1966. Use of the push rod guides "meant they could use ordinary non-hardened push rods. Screw-in vs. push-in studs was just a matter of machining the casting." If you want to go to screw in studs, you can remove the pressed in studs by putting a socket on top of the bare stud a washer than a hardened nut. You then put ice on the head and tighten the nut which will pull out the pressed in stud. 289 HIPO 67 289 Hipo Valves 1.67, 1.45 54.5cc "Outside of the five-to-six-bolt bell housing pattern change for 1965, the next most significant change for the small-block Ford is valve train and valve covers in 1966. On May 8, 1966, Ford went to a rail-style rocker arm on the small-block Ford. Instead of a push rod guide hole cast into the cylinder head, the rail-style rocker arm sat on a taller valve stem, which kept the rocker centered on the valve. At first thought, this is a good idea. But, when you consider engine wear and the possibility of using a high-performance camshaft, this idea is a bad one. As the valve stem tip wears, the side rails get closer and closer to the retainer. Eventually, they work their way into the retainer, which can fail, drop the valve, and destroy the 289/302" source diyford.com/choose-heads-small-block-ford-rebuild/ see How to Choose Heads for Your Small-Block Ford Rebuild. 1965 289s were HIGH COMPRESSION engines, putting these 54.5 cc chambers with 1.67/1.45-inch valves on a later 1970 302 engines will raise the compression. You will need to use 93 octane fuel. Small-block Ford cylinder heads began to change significantly in the 1970s, where you need to pay even closer attention to casting differences. Port and valve sizes remain virtually the same for 289/302 heads through the years, but combustion chamber changes a lot after 1971, chamber size volumes got larger. When combustion chamber size increases, compression drops. Ford, as well as all of the U.S. automakers, dropped compression to both improve emissions and deal with steadily falling octane ratings due to the elimination of lead, but with a corresponding drop in horse-power. These are not smog heads and therefore they have no ports for air pumps and will not pass California emissions. Ford 260 heads had even smaller chambers but also smaller valves and ports so obviously not a good performance choice. Note the machined push rod guide holes cast in the head as these heads do not use rail style rockers. FORD high performance 289 and 302 engine heads all have cast in valve guides that were machined and were never fitted with the heavier rail-style rockers. When it comes to the 289- and 302-ci engines, port sizes never changed, nor did valve size (except for the BOSS 302 which used 351 "Cleveland" canted valve heads). Contrary to all you've heard through the years from you buddies, the 289 High Performance cylinder head does not have larger valves and ports. Combustion chamber size isn't any different from the 2V and 4V head either. What is different is the performance heads all have cast in valve guides and do not use the rail style rockers and the Hi-Perf heads had screw in studs. If you are going to use a high lift cam you do not want rail style rockers. In non-performance heads the cast in guides were eliminated necessitating the use of rail style rockers but saving ford a lot of machining and therefore money but also reducing rpm as the rail style rockers are heavier and sloppy at high RPM due to the lack of the precision valve guides. Note the last picture shows a rocker comparison between the heavier rail rockers and non-rail rockers. You will have to use performance style rockers without rails, which unless you already have high performance heads you will need to buy new high performance oem or aftermarket rockers such as Crane and probably new push rods as well because your old ones probably have worn down tips as without guides the push rods wear down and may need to be replaced. |
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