|
|
|
Your donations help keep this valuable resource free and growing. Thank you.
|
Just bought a mystery 401! Need opinions? |
Post Reply 
|
Page 123 6> |
| Author | |
JolleyGreenSST 
AMC Apprentice 
Joined: Jul/12/2018 Location: High Desert, CA Status: Offline Points: 239 |
 Post Options
 Thanks(0)
 Quote Reply
 Topic: Just bought a mystery 401! Need opinions?Posted: Oct/22/2018 at 3:29am |
|
Hey guys I just bought a mystery 401! So I'm guessing you want to know what I mean by mystery 401?
Well I bought a 401 engine this past week and I'm really not sure what I got... I drove over 2 hours to San Diego and bought a 401 engine that I was told is out of a 74 Cherokee (casting number 3198951) I was told it was rebuilt, but when I got there rebuilt, meant it was honed, and had new rings and bearings installed with no machine work. So to be honest I don't trust anything I was told and will tear it down in a few days to see what I got? I'm hoping it's standard bore. But I couldn't pass on it for $900 and the guy threw in some headers and stuff that will work on my Jeep J10. As of right now it's still sitting in the back of my Silverado (I have a camper shell) waiting for me to clean a space out in my garage so I can unload it. Once I get it on a stand and start tearing it down, that's where I'll need some advice on what I'm looking for and anything specific I should be concerned with? I will update and post pics as I go. But for now, what do you guys think? I thought it was worth the chance imho. |
|
|
"God is good all the time and all the time God is good!"
|
|
 |
|
|
farna
Supporter of TheAMCForum 
Moderator Lost Dealership Project Joined: Jul/08/2007 Location: South Carolina Status: Offline Points: 19672 |
Post Options
Thanks(1)
Quote Reply
Posted: Oct/22/2018 at 6:02am |
|
Good find! At least it was (supposedly?) a running engine, so even if worn everything should still be useable... good rebuildable core. With any luck the worst thing you'll have to do is go to an oversize piston.
|
|
|
Frank Swygert
|
|
|
|
|
SC397
AMC Addicted 
Joined: Apr/30/2009 Location: Michigan Status: Offline Points: 5474 |
Post Options
Thanks(1)
Quote Reply
Posted: Oct/22/2018 at 8:25am |
|
It has a TH400 flex plate which means that if you are going to run a 904 or 727 you need to pull the spacer ring out of the back of the crank.
|
|
|
|
|
AMXFSTBK390
AMC Addicted
Joined: Oct/22/2013 Location: SF Bay Area Status: Offline Points: 3489 |
Post Options
Thanks(0)
Quote Reply
Posted: Oct/22/2018 at 12:28pm |
|
Good price for a long block 401. I'd send a scope through the spark plug hole to see if there is a piston size stamped on the piston and go from there.
|
|
|
Questions are powerful tools...what's in your toolbox?
|
|
|
|
|
JolleyGreenSST
AMC Apprentice
Joined: Jul/12/2018 Location: High Desert, CA Status: Offline Points: 239 |
Post Options
Thanks(0)
Quote Reply
Posted: Oct/22/2018 at 12:44pm |
Thanks, this is the kind of info that I'm Definetley going to need help with... aren't all of the AMC TH400's made for 4wd transfer cases to be bolted to the back, so I couldn't use one anyway right? Also I have a 304 in the car now, so it must be a 904 behind it, will that hold up to a 401? Thanks. |
|
|
"God is good all the time and all the time God is good!"
|
|
|
|
|
JolleyGreenSST
AMC Apprentice
Joined: Jul/12/2018 Location: High Desert, CA Status: Offline Points: 239 |
Post Options
Thanks(0)
Quote Reply
Posted: Oct/22/2018 at 12:46pm |
I already did that, but it was dark and raining when I bought it so I only checked a couple cylinders and they had to much carbon to read anything on top of the piston. |
|
|
"God is good all the time and all the time God is good!"
|
|
|
|
|
JolleyGreenSST
AMC Apprentice
Joined: Jul/12/2018 Location: High Desert, CA Status: Offline Points: 239 |
Post Options
Thanks(0)
Quote Reply
Posted: Oct/22/2018 at 12:48pm |
That's what I'm hoping for.. 🤞 |
|
|
"God is good all the time and all the time God is good!"
|
|
|
|
|
matty 401
AMC Addicted
Joined: Jul/06/2007 Location: Iowa Status: Offline Points: 1727 |
Post Options
Thanks(0)
Quote Reply
Posted: Oct/22/2018 at 12:51pm |
|
304 has a 998 heaver version of the 904 what are the plans for the 401 ? small upgrade from stock ? or all out monster ? a 998 will live behind a 401 if it is stock of a little beefier put a after market trans cooler for sure need to find a flex plate for a 401 to run torqueflite trans
|
|
|
72 matador 401 the beast
79 concord 2 door 72 matador 304 grasshopper 68 Rogue 406 93 Cherokee 4.0 5 speed |
|
|
|
|
PHAT69AMX
AMC Addicted
Joined: Jul/07/2007 Location: West Virginia Status: Offline Points: 5918 |
Post Options
Thanks(0)
Quote Reply
Posted: Oct/22/2018 at 5:05pm |
|
Did it come with a Distributor? The original Distributor? What are the Numbers stamped on the Distributor?
|
|
|
|
|
JolleyGreenSST
AMC Apprentice
Joined: Jul/12/2018 Location: High Desert, CA Status: Offline Points: 239 |
Post Options
Thanks(0)
Quote Reply
Posted: Oct/22/2018 at 9:26pm |
|
No distributor came with it.
I will probably reuse the original from my 304.
|
|
|
"God is good all the time and all the time God is good!"
|
|
|
|
|
Post Reply
|
Page 123 6> |
Tweet
|
| Forum Jump | Forum Permissions You cannot post new topics in this forum You cannot reply to topics in this forum You cannot delete your posts in this forum You cannot edit your posts in this forum You cannot create polls in this forum You cannot vote in polls in this forum |
Click for TheAMCForum Rules
Topic Options
SC397 wrote: