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dbltrbl 
AMC Apprentice 
Joined: Jul/06/2011 Location: Finland Status: Offline Points: 80 |
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 Posted: Jun/25/2017 at 8:38am |
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I had to remove the engine last year due to broken flexplate. While waiting for parts i inspected rod bearings, reused them as no issues found. This car is mostly street driven but i dont feel occasional strip use would hurt it.
I bought 401 crank and block and im planning to make something similar for my other amc. |
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captscot
AMC Apprentice
Joined: Feb/05/2013 Location: N Brunswick, NJ Status: Offline Points: 241 |
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Posted: Jun/25/2017 at 6:06pm |
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Sorry for kind of jumping in here. Would anyone know what the diameter is for a standard 401 crank's main and rod journals are, or a place where I could find the info? I bought yesterday at the Gettysburg show from a vendor a 401 crankshaft that is suppose to be standard. Today at home with a calipers I measured each hoping to compare the factory diameter to what I have. Also the difference to confirm how worn or if it is in fact standard and hasn't been ground? I got 57.11" rods and 69.80" mains.
Thanks Scott
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1972 Javelin AMX - orig owner
1985 Grand Wagoneer 1967 Jeepster 1968 Jeep Gladiator 1959 Jeep CJ5 1929 Marmon model 68 |
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tufcj
Supporter of TheAMCForum 
Supporter of TheAMCForum Joined: Jul/10/2007 Location: Watkins, CO Status: Offline Points: 4097 |
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Posted: Jun/25/2017 at 6:14pm |
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All AMC v-8s have 2.747" mains. Rods are 2.248" for the 401, 2.094" for the 304 and 360. These are standard. Some did leave the factory undersize, but they were few and far between.
Bob tufcj |
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69 AMX
74 Javelin AMX 67 Rogue If you need a tool and don't buy it... you'll eventually pay for it... and not have it. Henry Ford |
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jpnjim
AMC Addicted 
Joined: Nov/25/2007 Location: New England Status: Offline Points: 2752 |
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Posted: Jun/26/2017 at 6:42am |
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I never used this conversion for something so precise as bearing journals,
but the metric to std x.03937 formula shows that your specs are right on; 57.11x .03937 = 2.2484 69.80× .03937 = 2.748 Tufcj listed the factory specs as 2.248& 2.747 so that looks spot on to me.
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71 P-code 4spd Javelin/AMX
some Jeeps and some Fords |
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SC397
AMC Addicted
Joined: Apr/30/2009 Location: Michigan Status: Offline Points: 5480 |
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Posted: Jun/26/2017 at 11:28am |
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I would be willing to sell a 360 stroker kit with the 360 off-set ground crank, connecting rods and forged pistons if anyone is seriously interested. The pistons are for a 4.155" bore and the stroke is 3.53" resulting in a 383 cubic inch 360. Compression ratio would be about 9.5:1 with the big 62cc heads.
http://www.ifsja.org/forums/vb/showthread.php?t=110924 Here is some detail on how to install a 401 crank in a 360 block. http://www.ifsja.org/forums/vb/showthread.php?t=141096 |
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