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360 ID NUMBERS |
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dltowers 
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Joined: Dec/12/2012 Location: Friendswood, TX Status: Offline Points: 5827 |
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 Posted: Dec/07/2017 at 6:38pm |
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FYI....
This is the casting number on the original 360 engine block, in the wife's 1974 Javelin....  |
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Original Owner, 1974 Javelin:
360ci,2v,727TC. Motorola Multiplex with 8-Track. G4 Plum exterior with 421Q Black Uganda Interior. Purchased on July 16, 1974 from Hooker AMC, Sherman, TX for $4500.20 |
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WARBED
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Joined: Feb/12/2011 Location: Edinburg TX Status: Offline Points: 1688 |
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Posted: Jul/26/2018 at 9:23pm |
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I pretty much read this entire post and I do realize it's an old post but seams that nobody has ever mentioned that every AMC 3rd generation V8 has the last number off the year cast into the block in many locations. Not stamped but cast. passenger side off the block between the rear most core/freeze plugs and also in the valley area. I'll post the pics that I have. All the engines I have coincide with the year of the vehicle and tags numbers so I very much doubt that it's just a coincidence.
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59 American 2dr S/W. 70 390 AMX. 70 232 javelin. Kelvinator fridge ice cold beer storage.
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WARBED
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Joined: Feb/12/2011 Location: Edinburg TX Status: Offline Points: 1688 |
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Posted: Jul/29/2018 at 9:10am |
  THIS IS A 360 OUT OF A 75 WAGGY
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59 American 2dr S/W. 70 390 AMX. 70 232 javelin. Kelvinator fridge ice cold beer storage.
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jpnjim
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Joined: Nov/25/2007 Location: New England Status: Offline Points: 2752 |
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Posted: Jul/29/2018 at 9:28am |
Thanks!
I don't know why I never put this together, but it seems to check out: 401 on my engine stand out of 73 or 74 AMX = 4 unknown 360 tucked away = 4 I couldn't find the numbers on a gunked up 72 360 here, but I'll check the rest when I can
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71 P-code 4spd Javelin/AMX
some Jeeps and some Fords |
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ccowx
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Joined: Nov/03/2010 Location: Yukon Status: Offline Points: 3510 |
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Posted: Jul/29/2018 at 11:23am |
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As mentioned earlier in this thread, there should be a number for the year of the engine block's casting in the valley. That will be the year since they started casting that particular displacement. My 1970 390 has a 2 there, for 1969, 2nd year of 390 production. There is also a Julian calendar date there as well, which is 3 digits and gives the day of the year it was cast. Mine checks out as engine block casting of August 1st, August 15th for both heads, and the valve cover tag says August 25th, all in 1969.
Since they started casting 360's in the summer of 1969, I would expect a 71 or 72 engine to have a 2 or a 3 there, respectively. Note, this number is the year CAST in relation to the start of production of that engine, not the model year of the car it went into. My 1970 390 definitely was not cast in either 1962 or 1972, for obvious reasons.
It is a cumbersome system for sure, but contrary to myth it is very possible to determine the date of an AMC V8. You can not match it definitively to the exact chassis, but you can do everything but. Chris |
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WARBED wrote: