![]() Why go to the trouble to build an engine just 1ci bigger? The answer was economics: the 428 was cheaper to make as there were fewer rejected castings and cheaper internal parts. By tweaking the bore and stroke combination once again the 428 was born-it used a smaller bore and a longer stroke (4.135-inch bore/3.985-inch stroke). Undeniably the 427 FE was a hit, but Ford wasn't done with the design quite yet. It cut a swath through virtually every racing venue and in "side-oiler" configuration the performance of 427 Shelby Cobras was the stuff legends were made of (we should note we're leaving the 427 SOHC variant out of this conversation as they are a story in themselves). if it starts with a Number like (5751091 or B9AE-B it is a 58-59 332), a C 60's the. There is also a casting number in the valley area under the intake manifold. the date code is under the block on the drivers side in front by the oil pan. Of course one of the most famous of the FEs was the 427 (4.2328-inch bore/3.784-inch stroke). The casting number is on the passenger side of the block in front of the motor mount and freeze plug. The important digits are the first four and last one, two, or even three digits, in some cases. True to form Ford threw another FE in the mix with a similar displacement-the 410-inch FE used in Mercurys and Edsels had a smaller bore and a longer stroke (4.050-inch bore/3.980-inch stroke). Ford’s part number convention generally follows the format of a four digit casting code, followed by a four digit basic part number, which will be 6015 for an engine block, followed by the revision version. Cast in the lifter valley is an upside down 57. I took way to many credits for this.Although still an FE, the 406 that came next was based on a redesigned block to accommodate the larger bore (4.130-inch bore/3.784-inch stroke). Also stamped on the block on the pass side front is: Q4137 The blocks date code located below the oil filter boss is: WB 9C30 There doesnt appear to be an engineering or part number cast into this block, but it does have the typical 352 cast into it front and rear and the mold number 58. Where the block is usually stamped 352, its stamped S and near the oil filter attachment the block is stamped. The Nickel in higher quantity at a certain point becomes a bad thing. Meaning it's totally bogus on "high nickel" I use a lower nickel rod in certain areas of the block when welding but its for a "softer" weld. 29/50071-2this X only pertains if it's upside down LOL It shows up on any sort of Ford casting, even Model T Ford blocks. If you hear someone claim that their block is "high nickel" you can be sure of one thing - that guy has no clue what he is talking about.ġ915 Model T Ford touring Black of course!ġ968 Cougar W code 427 GT-E Madras Blue / Turquoise interiorġ968 Cougar GTE 427 Augusta Green / Saddle Nickel content in a higher than normal amount is not desirable for cast iron cylinder blocks. Basically the 390's are as follows: Z is a 4V, M is a tri-power, P is a PI, S is the 66-68 GT and the 69 IP, (edited, I realized I forgot one) X code premium fuel 2V, and H and Y are the low po 2V engines. I know from experience that F, G and H were 427 cores. Those blocks might have been used for industrial and marine engines, but they were also used to make up replacement automotive short blocks for warranty and service. CX appears on 428 blocks made after car production stopped. While odd compared to most other FE block types, it wouldn't be special unless missing oil galley plugs, or does have side-oil passages, or main cap cross-bolts or bosses, etc. Fits all Ford FE type blocks, 352, 390, 406. The C seems to have been used if the block had 428 cylinder cores. I think '41' is a batch number, and 'DIF' is Dearborn Iron Foundry. The Edelbrock 2036 RPM Dual-Quad manifold and carb kit is designed for 390-428 Big-Block Ford FE applications. In the foundry those marks on the rear bulkhead were used to indicate cylinder core thickness content of the block. The CX scratched into the sand core on the rear bulkhead of FE blocks is another matter. JerryIt shows up on any sort of Ford casting, even Model T Ford blocks. ![]() I read this in book about Ford block ID, wich also stated CX to be industrial use block.
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