Ford 144-250 inline 6 high performance building

The aluminum head with the detachable manifold, which flows worlds better than the stock "log" type, has recently become available again. They are now being sold my a company by the name of vintage inlines which is the spiritual successor to classic inlines after the company closed its doors due to the dead of the owner. The heads are available for the same price classic inlines sold them for. However, the price may vary depending on additional modifications requested such as porting and larger valve sizes. It should also be noted that the head has a different temperature sending unit at the back of the head in the stock location it is a smaller size but is easily found a local auto parts stores. Lastly, the "base model" and also cheapest aluminum head vintage inlines sells has 1.8 inch intake valves and 1.5 inch exhaust valves with a 55 cc camber. The head also comes with aftermarket dual valve springs which claim the following specs closed 110 lbs, open 260 lbs, inst hgt 1.68, duration up to 280 with all other specs being user verified.