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AMC V8 Crank ID Question. |
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amxess 
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Joined: Aug/30/2007 Location: Florida Status: Offline Points: 768 |
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 Topic: AMC V8 Crank ID Question.Posted: Sep/19/2017 at 1:42pm |
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Friend has two AMC V8 cranks he wants to sell, but trying to ID. Can't find these #s in my parts book. One has 3156921 F; and other has 3190797 F stamped on them. Thinks they are 390 cranks. Anyone help?
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PHAT69AMX
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Joined: Jul/07/2007 Location: West Virginia Status: Offline Points: 5919 |
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Posted: Sep/19/2017 at 1:58pm |
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Here's what I have on AMC V-8 Crankshafts:
317 8451 C 290/343 67-69 319 3816 C 290/343 67-69 319 5292 304/360 70-71 448 7237 304/360 70-71 321 4724 304/360 72-78 319 0792 F 390 68/69 - Part No. 320 8795 319 0797 390 - Part No. 320 8795 319 0798 390 - Part No. 320 8795 319 6927 390 70 - Part No. 448 7238 312 4725 401 - Part No. 448 8664 319 0079 401 - Part No. 448 8664 319 6921 401 71 - Part No. 448 8664 319 9813 401 71 - Flat Flange 319 6922 401 - Part No. 448 8664 319 9842 401 72-76 - Part No. 812 0510 321 4725 401 72-76 - Part No. 812 0510 322 0411 401 72-76 - Part No. 812 0510 |
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304-dude
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Joined: Sep/29/2008 Location: Central Illinoi Status: Offline Points: 9082 |
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Posted: Sep/19/2017 at 1:59pm |
The 315-6921F crank is for 71 401. If the 7th number given as a 1, is actually a 7 then it would be for a 70 390. The 319 0797F may be for a 68/69 One way to check for dates is on the counter weight machined face near the front of the crank. It should have large number like 68, 69 or 70. Though some early 70 cranks were done in 69. Not sure but the 68 390 did not start production til 68. |
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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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amxess
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Joined: Aug/30/2007 Location: Florida Status: Offline Points: 768 |
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Posted: Sep/19/2017 at 2:19pm |
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Thanks all. Both are the early flange. I'll post these in the for sale section later with owners tel#. Believe both are 20 over. Probably been stored since the 80's. Located in Ft. Lauderdale.
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P2P AMX
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Joined: Oct/02/2015 Location: London Status: Offline Points: 85 |
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Posted: Jun/09/2018 at 9:35am |
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Is there any difference between manual and auto crankshafts?
mstrcrftr  has a crank listed 317 8451 C which looks like it would do the trick? I need a crank for a 343 Manual Jim |
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Jim
Dare to be diffident |
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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: Jun/09/2018 at 1:09pm |
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Manual and Auto cranks are the same,
Manual would have a pilot bushing inserted for the input shaft. 290 & 343 cranks are the same as well, but the 290 crank is balanced to the lighter pistons so you may have to add weight to one if used in a 343. Auto vs Manual flyweel confusion may be because of the crankshaft change in 1972 to use Mopar Auto's, 1972 + crankshafts, or adapter plates are needed to use a later 9xx, or 727 series Mopar Auto.
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71 P-code 4spd Javelin/AMX
some Jeeps and some Fords |
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mstrcrftr
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Joined: Jul/12/2010 Location: houston Status: Offline Points: 2066 |
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Posted: Jun/09/2018 at 3:30pm |
I was just getting ready to ask this question.
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amxess wrote: