Engine swap 318 to 360

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Old 03-10-2010 | 01:06 PM
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SfloreS's Avatar
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Engine swap 318 to 360

New to this stuff help is greatly appreciated !
I have a 67 D 200, 4 speed manual with a LA 318 a want to swap it with a LA 360. What problems may I run into if any? Are motor mounts the same?
Thanks for the input
Old 03-10-2010 | 10:32 PM
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yes the motor mounts will work but you may have to do some shimming with washers. Also, the 360 has external balance so you will have to deal with that. I guess you could weld the balance weight to the flywheel. Or get a 360 flywheel. other than those two things, it should be a fairly easy swap. You might try to use the same style of oil pan as far as the original sump location goes. [middle or rear]. you could use the 360 truck manifolds ( i had a 68 D 200 with a 318 and it had the 360 heads on it with the 360 truck exhaust manifolds from a 76 d 200).
Old 03-11-2010 | 08:36 PM
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318>360 "yawn".
Old 03-19-2010 | 01:38 AM
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Yes, the 360 is an externally balanced engine, you'll need to find a flywheel from a 360 for the swap to work. I learned the hard way what happens if you use the wrong converter/flywheel in a swap.
Old 06-19-2010 | 09:02 PM
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One thing to remember about the 360/318, is the 360 has larger main journals, hence a larger front/rear main seal...hence a different pan. I don't know if this holds true for the truck, but the motor brackets are different for the 273/318, 340/360 A body. Just throwing that out there...

j
Old 06-19-2010 | 10:16 PM
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From: couer d' alene id.
Originally Posted by chlngr1970
the motor brackets are different for the 273/318, 340/360 A body. Just throwing that out there...

j
not being a dick but the 273/318/318poly/340 are the same mounts 360 is the odd ball,
Old 06-20-2010 | 05:51 AM
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i just got done doing a 318 to 360 swap in my dart my 360 was a truck motor from a 89 ramcharger i have the rear sump oil pan and pick up tube and the motor mounts if your interested 60.00 bucks plus shipping
Terry
Old 06-20-2010 | 05:56 AM
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Originally Posted by 1966sportfury
not being a dick but the 273/318/318poly/340 are the same mounts 360 is the odd ball,
340 and 360 are the same the driver side mounting tabs on the block are closer together
Old 06-20-2010 | 10:35 PM
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From: couer d' alene id.
Originally Posted by ef8340
340 and 360 are the same the driver side mounting tabs on the block are closer together
what! i musta been high (and i dont )when i had my 340, i swear they the same a the 318, well i apologize
Old 06-21-2010 | 02:33 AM
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I always thought that the LA motors (273-360) all used the same casting for the block and heads and it was just what was on the inside that made them all differ.

Only other thing that I know is different between the 273-340 motors and the 360 is that the 360 is externally balanced, while the others are internally balanced..... or do I have that backwards too?
Old 06-21-2010 | 02:48 AM
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From: couer d' alene id.
some 340s had cast external ballanced cranks, also the 67 and earlier 273 heads had a different angle on the intake side, meaning only the pre 68 273 intake will bolt on, the later intakes will cause a vacuum leak,

Last edited by 1966sportfury; 06-21-2010 at 03:04 AM.
Old 06-21-2010 | 07:05 AM
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so 318 intakes won't correctly fit on the 273's?
Old 06-21-2010 | 12:08 PM
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1966sportfury's Avatar
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From: couer d' alene id.
Originally Posted by 67 GTX
so 318 intakes won't correctly fit on the 273's?
318 intakes will fit fine on the 68,69 blocks, but not eairlier
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