i've had 3 of those motors and they are good for 175 to 200 K miles then the rear main seals leak you just drop the pan replace the main bearings and the seals then it will go another 200 K tough motors if you ever rebuild one you should always make a stroker out of it with just changing the crank and rods to a 4.2 older 258 jeep motor. the 4.0 / 242 is one good motor.
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1978 V20 Cuddy w/ 225 Johnson. And Several other boat's
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