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Old September 13th, 2012, 04:18 PM
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Question 307 olds
how can you tell if your 307 olds motor is a h/o or not ? mine is a 84 motor?
thanks for any help out there!
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Old September 13th, 2012, 08:00 PM
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What heads does it have? Does it still have an idle speed control at the carb? If so is it electric or vacuum?
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Old September 17th, 2012, 06:57 PM
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an 84 should have 5A heads and is the better of the 307 motors.

Is it orginal to the car? If so, the VIN will have a 9 in it instead of a Y. That's why the 307 H/O is refered to as the "9" motor
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Old September 19th, 2012, 02:13 AM
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Originally Posted by mrwiuff
how can you tell if your 307 olds motor is a h/o or not ? mine is a 84 motor?
thanks for any help out there!

It would have a normal sized balancer.
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