Thread: FE Differences

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428's were great motors, but they their 2 bolt main caps and standard oiling systems were not up to Grand National competition standards. If you do the math the 4.2325" x 3.7800" dimensions of the 427 actually net you about 425 cubic inches... Go figure.

As a side note. Most "427" Shelby Cobra's had 428's in them... The 428 was $900 cheaper than the 427 in 1967. Seems cheap today, but back then it was a small fortune.

a 390 block which has a 4.05" bore and a 3.98" stroke netted you 406 cubic inches. The 406 was made in 1962 (one year only) It also had cross bolted mains. 406's and 427's also had additional reinforced webbing in the crank saddles, as did the 390 GT engines of that era, these engines were essentially 427 castings bored to 4.05". The C3AE 390's are probably the best kept secret in the FE line with their high nickle content, reinforced crank saddles, thicker cylinder walls and cast but not drilled cross bolt main bosses. The casting number C3AE appears on both 390 and 427 engines in 1963-1964.