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Replacing 727 with Original BW m-12 |
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vyscera
AMC Apprentice Joined: Jul/12/2016 Location: Fl Status: Offline Points: 48 |
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Posted: Jul/25/2017 at 6:02pm |
I have a machine that currently has a 401/727 setup, the original motor/trans came with the car. I'm starting the process of getting the original stuff rebuilt to have put back into the car by a shop. So far I've read that I might have to find new shift linkage to reconnect to the M-12 to the console shifter. Any thoughts to other areas that might need to be looked at? The motor and trans are separated, as well.
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304-dude
AMC Addicted Joined: Sep/29/2008 Location: Central Illinoi Status: Offline Points: 9081 |
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I have a shifter link for 70 and 71, will sell for $20.00 shipped.
I will post both diagrams. Not sure if part number is the same but 68 and 69 are clearly not straight like 70 and 71. Will post the diagrams of all three console types. Bent style linkage 68 and 69 console Straight style linkage 70 console Straight style linkage 71 console Edited by 304-dude - Jul/25/2017 at 6:21pm |
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71 Javelin SST body
390 69 crank, 70 block & heads NASCAR SB2 rods & pistons 78 Jeep TH400 w/ 2.76 Low 50/50 Ford-AMC Suspension 79 F150 rear & 8.8 axles Ford Racing 3.25 gears & 9" /w Detroit locker |
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vyscera
AMC Apprentice Joined: Jul/12/2016 Location: Fl Status: Offline Points: 48 |
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Awesome 304-Dude, thanks!
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WesternRed
AMC Addicted Joined: Aug/03/2010 Location: Australia Status: Offline Points: 5787 |
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You will need the driveshaft and yoke for the M12.
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vyscera
AMC Apprentice Joined: Jul/12/2016 Location: Fl Status: Offline Points: 48 |
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Is the m-12 longer than a 727? I cant find any measurements on the m-12, and I just put it in the shop to get checked out.
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rockAMX
AMC Addicted Joined: Sep/16/2011 Location: Lethbridge AB Status: Offline Points: 983 |
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If you are keeping the 401, you might need an adaptor for the crankshaft or machine the end of it to mate with the M12. Others can add in on this.
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DWR
1968 AMX |
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vyscera
AMC Apprentice Joined: Jul/12/2016 Location: Fl Status: Offline Points: 48 |
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I'll be putting the original 390 back in with the m-12. I should have clarified earlier.
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6PakBee
Supporter of TheAMCForum Charter Member Joined: Jul/01/2007 Location: North Dakota Status: Offline Points: 5454 |
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I'm only going to say this once, keep the 727. Yes, you'll have to modify the 390 crank to accept the 727 torque converter OR put the entire 401 reciprocating assembly into the 390 block. But any way you cut it, the 727 is a superior transmission to the BW unit.
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Roger Gazur
1969 'B' Scheme SC/Rambler 1970 RWB 4-spd Machine 1970 Sonic Silver auto AMX All project cars. Forum Cockroach |
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304-dude
AMC Addicted Joined: Sep/29/2008 Location: Central Illinoi Status: Offline Points: 9081 |
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Especially if it is from a 401. Since you have the 390 out, it is a no brainer to modify the crank to fit the 727 torque converter snout. Keep all the stuff for installing it, as you will need it. |
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71 Javelin SST body
390 69 crank, 70 block & heads NASCAR SB2 rods & pistons 78 Jeep TH400 w/ 2.76 Low 50/50 Ford-AMC Suspension 79 F150 rear & 8.8 axles Ford Racing 3.25 gears & 9" /w Detroit locker |
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RovDyr71
AMC Apprentice Joined: Jun/23/2012 Location: Denmark Status: Offline Points: 71 |
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Hi guys
Sorry for crashing the party after it's finished. Looking at the illustrations that 304-dude posted above, I realize that my shifter link is of the wrong type. Apparently it should have been a straight style link according the illustrations, but mine's not. It's bent in two places, so either some previous owner bent it or put on a link from a wrong model/year. I should be able to straighten it out properly, so if anyone can post a length measurement from their 71' (or '70 if it's similar) shifter link I would be most grateful. My combo is a '71 Javelin, M-11B with floor console.
Edited by RovDyr71 - Jul/31/2017 at 9:43am |
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AMC Javelin SST '71
360-4V-M-11B |
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