This 1971 400 block (D1AE-A2C) has a smallblock bellhousing bolt pattern, which is quite rare. You can find reproductions of this orifice plug on eBay. It can be removed for block cleaning, but must always be replaced. This brass bypass orifice plug (D0AZ- 8K217-A) must never be removed and is exclusive to the 351C engine family. And when you mill, mill only the bare minimum necessary. Block deck should be sonic checked and checked for warpage before any milling is performed. Aside from customary honing, MCE Engines puts on a nice fine finish hone for good ring seating.

This 351C block at MCE Engines being built for Mustang Monthly magazine has been decked and honed. The “M” designation was conceived to differentiate the 351C from the raised-deck 351M, which replaced the 351C in 1975. No matter how you look at the 400 or the 351M (for Modified or Midland), both use the same block casting that was in production from 1971 to 1982 though there are different part numbers. The raised-deck 400 Cleveland, first introduced for model year 1971, was always known as the “400.” When Ford destroked the 400 to 351 ci and called it the 351M in 1975, people started calling the largest Cleveland the 400M. Though the 400 is called the “400M” by a lot of people, it has never been called this by Ford Motor Company. Where Cleveland blocks and terminology get confusing is 351C versus 400 and 351M. Never believe what you see until the pan is pulled and the caps are inspected. Thing is, not all D2AE-CA blocks have four-bolt main caps. This is the four-bolt main 351C block with a D2AE-CA casting number.

You can use the social sharing buttons to the left, or copy and paste the website link. This Tech Tip is From the Full Book.įor a comprehensive guide on this entire subject you can visit this link: SHARE THIS ARTICLE: Please feel free to share this post on Facebook / Twitter / Google+ or any automotive Forums or blogs you read. Any Cleveland two-bolt main block can be converted to a fourbolt main if you have the stock iron or aftermarket steel billet caps. And if you take away the casting numbers and date codes, these blocks tend to defy detection except for minor casting changes.

All have the same main webs and pan rails. The 351C block castings, despite different casting numbers, are all basically the same casting and can all be converted to four-bolt main caps with help from a qualified machine shop. There has always been some confusion when it comes to Cleveland block identification. Factory-installed 289 High Performance engines had the vehicle serial number stamped into the. Where is the engine identification number on a 1988 ford 302 HO motor located? - Answered by a verified Ford Mechanic.

1988 ford engine serial number location