Flywheel interchangeability
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Freshman User
Joined: Jul 2003
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Flywheel interchangeability
Are all 302 flywheels the same? I know that the balances are different in some years but i was talking more in dimensions. do the diameters ever change? what about the thickness? The hole reason I was woundering was because I am curently looking for a used flywheel for a 70's 302. I am going to put the 302 in a 1986 F-150. the truck has a 300 in it and i plan to use the same tranny. My major concern is the number of teeth on the 302 flywheel will be different from the number on the 300 flywheel. how can I tell without pulling the 300 out to count them?
Mountain Pass
Joined: Jun 2004
Posts: 241
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From: Canada
Small block flywheels had either 157 or 162 teeth. The 157 is earlier. The 162 will have a slightly larger diameter to account for the 5 extra teeth. There is two imbalance weights 28 oz. (Early) and 52 oz. I'm not sure what year they changed. You could install the 300 flywheel on the 302, however it will vibrate as the balance will be off.
Cargo Master
Joined: Dec 2003
Posts: 2,734
Likes: 38
From: Sunny Florida
Originally Posted by kingcavinee
so could I just get a different starter to acount for the smaller diameter?
Mountain Pass
Joined: Jun 2004
Posts: 241
Likes: 0
From: Canada
If you had the flexplate that came off the 302 you could have the 300 flywheel rebalanced to match it. However finding a flywheel should not be too hard. I agree the 300 flywheel is 162. The starter is the same, the bell is larger.
Cargo Master
Joined: Dec 2003
Posts: 2,734
Likes: 38
From: Sunny Florida
A machine shop can balance it for you and yes there are plenty of the larger fly wheels out there. Most mustangs from around 66 and up got the larger flywheel. Not sure on the year but there out there. Any 351W motor will have this flywheel. One thing to watch out for is the mounting holes for the pressure plate. I am not sure all flywheels have the same patterns for the pressure plate.
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New User
Joined: Oct 2004
Posts: 23
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From: juniata county
cost to rebalance flywheel
it cost me 80 dollars to get my balanced .
I know that a 1991 300 6 cyl flywheel will fit a 1967 351 w block
I know that a 1991 300 6 cyl flywheel will fit a 1967 351 w block
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Senior User
Joined: Jan 2003
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From: Calgary
If you now have a flywheel with the 70 302 then you need to get an early bellhousing that will match it. Or if you don't have a flywheel now then it would probably be easier to find a late model 351 W flywheel that will have the right 28 oz. balance and should have the same tooth count as 86 6 cylinder. So the 86 bellhousing should work. I got an early 80's I6 flywheel from the local pick-a-part and it has 162 teeth.
Maybe the safest thing is if you find a 351 flywheel then be sure to get the bellhousing too...sort of a matching set.
Maybe the safest thing is if you find a 351 flywheel then be sure to get the bellhousing too...sort of a matching set.
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