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1970 390 harmonic balancer |
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Buddys427 
AMC Apprentice 
Joined: Dec/10/2013 Location: Rapid City, SD Status: Offline Points: 37 |
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 Topic: 1970 390 harmonic balancerPosted: Aug/14/2017 at 6:38pm |
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We are re-building my 1970 390 motor and noticed that it has a crack. Will a 68-69 390 balancer be the same to do a swap? Thanks for some expert advice. Thanks, Buddy |
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bbgjc
AMC Addicted 
Joined: Nov/24/2009 Location: No.VA Status: Offline Points: 1660 |
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Posted: Aug/14/2017 at 6:42pm |
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No. You'll need the one year specific 70 Balancer. I believe I have a spare one. I can check tomorrow.
I would absolutely have the rotating assembly balanced using the balancer you source from whom/where ever. |
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Buddys427
AMC Apprentice
Joined: Dec/10/2013 Location: Rapid City, SD Status: Offline Points: 37 |
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Posted: Aug/14/2017 at 6:47pm |
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Great information. Yes, we plan to balance the assembly when we get this replacement balancer. Let me know if you come up with one and thanks, Buddy
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Buddy Belzer
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401MATCOUPE
AMC Addicted
Joined: May/20/2010 Location: Salisbury, MD Status: Offline Points: 5366 |
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Posted: Aug/14/2017 at 7:34pm |
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If John (bbgjc) can not help you with balancer I a good used one.
Ross
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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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vyscera
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Joined: Jul/12/2016 Location: Fl Status: Offline Points: 48 |
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Posted: Jan/12/2018 at 2:19pm |
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Looks like I'm in the market for a 70 390 balancer, is there still one available?
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amc67rogue
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Joined: Nov/05/2008 Location: Phx. AZ. Status: Offline Points: 1578 |
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Posted: Jan/12/2018 at 2:23pm |
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70-71 360s use the same balancer. Let the flame wars begin.
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Keith Coggins 67Rogue X code
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Red20
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Joined: Jan/29/2013 Location: Oceanside CA Status: Offline Points: 1556 |
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Posted: Jan/12/2018 at 3:14pm |
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If the rotating assembly is already in the block, can you not match balance the replacement balancer to the old one, assuming it was balanced with the rotating assembly? I did that with a built short block I picked up when I wasn’t using the balancer it was built and balanced with. It was a ‘74 360 block that I was putting 290 front dress on to maintain stock appearance.
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1969 Javelin SST "Screamin' Banana" - Totaled Feb 2018
1973 Hornet Sportabout X "yellajack" - 360/727/TracLoc DAILY DRIVER |
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amxron
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Joined: Nov/18/2011 Status: Offline Points: 295 |
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Posted: Jan/17/2018 at 12:39am |
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Just have the new one balanced to match the old one.
Any balance shop can do it for a few bucks. Ron. |
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AMXron
Fleet/Jeep Mgr. Orbit AMC/Jeep 50-1787 |
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