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By aussie-y - 15 Years Ago
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have a 256 mercury motor going to fit 272 crankshaft & rods will the 272 camshaft fit also.
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By Ol'ford nut - 15 Years Ago
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I have been told they will, don't forget to change the dizzy also.
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By Ted - 15 Years Ago
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The crankshaft will fit right in so no problem there. But the cam is another story. If the 256 engine is a '54 model, then the cam journals may be the larger size which prevents the ’55 and up camshafts from being run without modifying the cam bearings appropriately. The ’54 engines had cam journal sizes and corresponding cam bores in the block that were approximately 0.125” larger than the ’55 and up engines. It's easy enough to make new cam bearings for the early block though and use the later camshafts if you have access to a capable machine shop. The '55 model pickup 256 engines had the smaller cam journals so no problems there in using any of the later cams.
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By aussie-y - 15 Years Ago
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thanks for that information ted told the machine shop where i,m having the engine rebuilt ,and he said if the cam bearings couldn,d be found that they would machine new ones up.are going to use the heads of a 272 also.
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