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What do I have?
If it is cross bolted then it's a 406 or 427. Cast numbers will not tell you everything about the inside of the motor. I checked the cast numbers on an old truck motor and thought I had a 428. I took the heads off and measured the bore and stroke. It was a 352.
A friend bought a 390 in a 1967 stationwagon. One day he noticed something different about the damper. He did a little checking and found the vin number had a Q code for the engine, 428! I bought the wagon from him for the motor.
You will not know until you tear it apart and measure it.
I have heard of people buying 427 or 428s from dealer to find out years later they had a 390.
Dwight
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''Life's tough.....it's even tougher if you're stupid.'' ~ John Wayne
"Happiness Is A Belt-Fed Weapon"
life's goal should be; "to be smarter than inanimate objects"
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