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orange442 · August 5th, 2006, 08:55 PM

Earlier 455's had a higher nickel content in the casting(look on back of block for F1.F2, etc.) the smaller the number next to the F the higher the nickel content. They also usually had nodular cranks marked by an N or CN cast into one of the throws on the crank. Any year 455 can be built to run strong, the earlier stuff is just inherantly stronger and longer lasting.

August 5th, 2006, 08:55 PM	#9 (permalink)
orange442 Registered User Join Date: May 2006 Location: Bartlesville, Oklahoma Posts: 184	455 Earlier 455's had a higher nickel content in the casting(look on back of block for F1.F2, etc.) the smaller the number next to the F the higher the nickel content. They also usually had nodular cranks marked by an N or CN cast into one of the throws on the crank. Any year 455 can be built to run strong, the earlier stuff is just inherantly stronger and longer lasting.