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1967 - 1972 F-100 & Larger F-Series Trucks Discuss the Bumpsides Ford Truck

360/390 flywheel?

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Old Jul 9, 2003 | 09:23 PM
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primemover22's Avatar
primemover22
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From: lancaster
360/390 flywheel?

I have a 1970 360 w/ 4 speed and want to put a 65 merc 390 in will the 360 flywheel work? or is there a balance issue. I would like to add headers and 4 bbl aluminum intake if anybody has some lying around. thanks.
 
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Old Jul 9, 2003 | 11:25 PM
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krazdndenver's Avatar
krazdndenver
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From: Denver
360/390 flywheel?

No, the 360 flywheel is smaller diameter, but I would think if you used the tranny from the 390 it would work. It is the size of the flywheel that matters in this case.
Robert
72 F100 Ranger XLT W/ 86 55.0L EFI W/ AOD
www.geocities.com/krazdndenver
 
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Old Jul 10, 2003 | 01:03 AM
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From: lancaster
360/390 flywheel?

the 390 is automatic and I wanted to keep my 4 speed, I think I'll get a flywheel for the 390 and then look for a clutch. It's kind of a shame that fordomatic shifts great.
 
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Old Jul 10, 2003 | 04:10 AM
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willowbilly3
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From: Black Hills of SD
360/390 flywheel?

I've made that swap many times and all your 360 stuff will work just fine. No balance problems should occur. Just make sure your 390 has a new pilot bushing installed in the end of the crank. All the FE engines from cars and pickups balance the same except for the 410 and 428. I once had a 69 4 speed pickup that had a 360 then a 390 and eventually a 332 car motor and I used the same setup on them all. I put a 428 flywheel on the 390 and had to take it back out because of the imbalance.
 
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