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287 to 327 Swap |
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btmendenhall
AMC Fan Joined: Jun/10/2019 Location: California Status: Offline Points: 19 |
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Posted: Aug/10/2020 at 4:02pm |
Hi Everyone,
I am sure that this is already on here somewhere, i just couldnt find it with search, so apologies in advance. I have a '64 Classic 770 with a 287. The motor is out of the car for rebuild and the block needs a lot of work. Is it possible to swap a 327? If so, what sort of magic do i need to do to make this happen? Thanks in advance.
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Trader
AMC Addicted Joined: May/15/2018 Location: Ontario Status: Offline Points: 6761 |
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Yes they will but there are fa few catches (motor mounts being one), especially if you want to do a transmission swap at the same time.
I'll direct you to this post for lots of info:
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btmendenhall
AMC Fan Joined: Jun/10/2019 Location: California Status: Offline Points: 19 |
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Thank you for sharing! I read through and there was definitely some helpful info in there. It sounds like the 287 to 327 is pretty much a bolt-in once you drill and tap the bosses on the block for the bellhousing?
One thing i saw that raised a question.... Does the 287 only work with the M8, and the 327 only work with the M10? I just rebuilt the trans, which i am guessing is the M8 (not sure how to tell). This might be a deal breaker if it's the case. On a totally different note, i saw there is a way to stroke the 287 using Honda rods... What crankshaft do you use?
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Cricket
AMC Addicted Joined: Jul/06/2015 Location: Milton, FL. Status: Offline Points: 736 |
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Any 1963 and later 327 is a direct bolt in to a 63-66 Classic, or any other big body Rambler. You only have to bother with drilling and tapping motor mounts holes if you have an older car; IE - 1962 and earlier, but not yours.
Yes, you can use your M-8, it is actually more desirable by many, because the TV cable on the 65-66 transmissions can be troublesome.
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btmendenhall
AMC Fan Joined: Jun/10/2019 Location: California Status: Offline Points: 19 |
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Thanks! l guess I'm on the lookout for a 327 cylinder block.. Other than pistons and the intake manifold, are all parts compatible between the two? I already have a 327 4-barrel intake and need pistons for the rebuild regardless.
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farna
Supporter of TheAMCForum Moderator Lost Dealership Project Joined: Jul/08/2007 Location: South Carolina Status: Offline Points: 19611 |
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YES. Not much point in me saying much here, as I answered most questions in the linked post!! Except for bore the 287 and 327 are identical. So just pistons/rings/block are different. You can't bore a 287 out to 327 bore! There is a 1/4" bore difference between the 250/287/327 (3.50", 3.75", 4.00"-- same forged crank and rods). Most part from the 250 will interchange as well, but the 250 has mechanical lifters. I don't know if the 250 can be converted over to hydraulic or not, may not have the required oil passages, though I think it should. People used to change over to the 250 mechanical lifters for high rpm performance 327s, but not much point in that any more! Can't buy a cam with a really high lift for the 327 since the late 60s.
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Frank Swygert
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Rebel327
AMC Nut Joined: Jan/26/2014 Location: Toledo Ohio Status: Offline Points: 358 |
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Like others have said..63 and up 327 block is direct replacement as to mounting location...engine cushions.
The 2 to 4 bbl conversion has an issue with throttle cable and transmission kick down linkage. It must be dimensionally the same as 2 bbl. I'd test for the 2 bbl...then install 4 bbl. This is critical. The mounting location on 4 bbl are different...fyi
Edited by Rebel327 - Aug/10/2020 at 6:58pm |
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btmendenhall
AMC Fan Joined: Jun/10/2019 Location: California Status: Offline Points: 19 |
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Did i read the wrong post? The one above was about a guy doing a 6 to 8 swap on an Ambassador. Most of the info was about motor mounts and drivetrain from 6 to 8.... Regardless, thank you for the info above. I think i have what I need to move forward. This was very helpful!!! Edit: it was a Rambler Custom, not an Ambassador.
Edited by btmendenhall - Aug/10/2020 at 6:43pm |
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btmendenhall
AMC Fan Joined: Jun/10/2019 Location: California Status: Offline Points: 19 |
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I wasnt aware. I still have all of the 2bbl stuff, so ill check everything. Thanks!
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farna
Supporter of TheAMCForum Moderator Lost Dealership Project Joined: Jul/08/2007 Location: South Carolina Status: Offline Points: 19611 |
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I think you read it right. A 63+ 287/327 directly interchange, that's all you really need to know! A 63-66 motor can be fitted in an older car that had a factory V-8, but you may have to drill and tap the forward mounting bosses. 56-62 V-8s don't have the bosses in the block for the more centered motor mounts of the 63-66 models. It's possible to make adapter plates if necessary, but the most commonly found motors are 63-66 anyway. The kick-down linkage is slightly different between 2V and 4V carbs with the 65-66 M-10 trans (with TV cable -- that doubles as a kick-down cable). The M-8 uses an electric kick-down switch which is easier to adapt and adjust. It just has to be mounted somewhere so that it's depressed when at wide open throttle. Same with later model M-11/12 transmissions (and the M-4x aluminum models).
Edited by farna - Aug/11/2020 at 4:14am |
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Frank Swygert
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