Thread: How do you visually tell the difference between a 400 & 429/460 engine?
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Old 07-07-2011, 12:47 AM
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tude
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351M and 400 the manifold bolts are at an angle

429 and 460 the manifold bolts are in a straight line BUT the 429 was stopped being made in 71 or 72 as i recall you, so if the block number is D3-D9 its not a 429, this number is above the starter
 
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