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Engine cradle/crossmember |
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Steve_P 
AMC Addicted 
Charter Member Joined: Jun/28/2007 Status: Offline Points: 3803 |
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 Posted: Jun/11/2019 at 7:13am |
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The fastener layout changed on the later Javelin crossmembers. They will interchange if you use the correct fasteners. The second gen crossmember only uses countersink style fasteners on one side of the car vs both sides for the first gen.
The lower control arm did change in 1970 but the mounting into the crossmember is the same. AMC set the part numbers, not the suppliers. |
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FritzF3
AMC Apprentice 
Joined: Sep/12/2018 Location: 52316 Status: Offline Points: 112 |
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Posted: Jun/11/2019 at 7:23am |
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14/64 is the same as 7/32. Did you mean 15/64?
Fritz
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Amc wannabe
AMC Apprentice
Joined: Jan/08/2014 Location: DE Status: Offline Points: 86 |
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Posted: Jun/11/2019 at 1:31pm |
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Steve, when does that change occur? Would my 1970 straight six fall into the early or late category?
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401MATCOUPE
AMC Addicted
Joined: May/20/2010 Location: Salisbury, MD Status: Offline Points: 5366 |
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Posted: Jun/11/2019 at 2:36pm |
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The attachment fastener change happened in 1971.....
68-70 uses 2 bolts with a taper under the head, the same bolts used to hold many tractor wheels in place and 2 studs with lugnuts...taper side towards crossmember. 71 up used the two studs with lugnuts and 2 each 1/2"- 20 bolts with thick flat washer under head. All 68=70 V-8 Javelin and AMX Crossmembers will interchange with no issues on control arms or engine mounting. If you need one PM me I have several used from Javelin.
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Ross K. Peterson
68X,GoPac,343,AT,52A(1stCar) 68X,GoPac,390,4sp,52A 69X,GoPac,390,4sp,64A 70X,GoPac,390,4sp,87A,8 70X,GoPac,390,4sp,BBO,8 70 Jav SST,390,AT,BSO 74MatX,401,AT,Prototype 74MatX,401,AT |
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farna
Supporter of TheAMCForum 
Moderator Lost Dealership Project Joined: Jul/08/2007 Location: South Carolina Status: Offline Points: 19672 |
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Posted: Jun/12/2019 at 6:59am |
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Yes Fitz... meant 15/64!! AMC set the part numbers, but they usually changed part numbers when they changed vendors on many parts, or when vendors made a change so they could tell where the part came from in case of issues later.
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Frank Swygert
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Amc wannabe
AMC Apprentice
Joined: Jan/08/2014 Location: DE Status: Offline Points: 86 |
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Posted: Jun/13/2019 at 7:02am |
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401matcoupe, I sent you a message. Looks like your relatively close to me? Might be able to snag it in the coming weeks if your free and not wanting it’s weight in gold haha
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401MATCOUPE
AMC Addicted
Joined: May/20/2010 Location: Salisbury, MD Status: Offline Points: 5366 |
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Posted: Jun/13/2019 at 7:07pm |
Plenty of parts here after parting out 100's of AMC's!! Prices are always reasonable, sent you PM and my number.
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Ross K. Peterson
68X,GoPac,343,AT,52A(1stCar) 68X,GoPac,390,4sp,52A 69X,GoPac,390,4sp,64A 70X,GoPac,390,4sp,87A,8 70X,GoPac,390,4sp,BBO,8 70 Jav SST,390,AT,BSO 74MatX,401,AT,Prototype 74MatX,401,AT |
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Amc wannabe wrote: