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Main Bearings
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Trader View Drop Down
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Joined: May/15/2018
Location: Ontario
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Points: 6876 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Trader Quote  Post ReplyReply Direct Link To This Post Posted: May/19/2021 at 9:57am
I did a search and the only complete "set" of 5 main bearings other then the AMC/Jeep 290-401 are the AMC 4.7l motor.
No GM, Ford or Mopar.
GM 396, 427, 454, 502 bearings look like they may be made to fit, all but the thrust bearing.
I have a call in to see what would be the cost to have old bearings refurbished with new Babbitt. I have several sets of old shells. I somehow doubt that that will be cost effective even if I machine them to size myself.
Thanks John for the offer. I may take you up on that when I get into these motors later this summer.
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rang-a-stang View Drop Down
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Joined: Sep/25/2018
Location: Camarillo, CA
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Points: 272 		Post Options Post Options   Thanks (0) Thanks(0)   Quote rang-a-stang Quote  Post ReplyReply Direct Link To This Post Posted: May/21/2021 at 1:19pm
I used some Sealed Power bearings in .001 under and have these left over. Summit shows them in stock for ~$78.





Edited by rang-a-stang - May/21/2021 at 1:21pm
79 Cherokee, 401
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bbgjc View Drop Down
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Joined: Nov/24/2009
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Points: 1660 		Post Options Post Options   Thanks (0) Thanks(0)   Quote bbgjc Quote  Post ReplyReply Direct Link To This Post Posted: May/21/2021 at 3:06pm
King will still be supplying AMC parts. They just are waiting for resupply, along with everybody else.  
My valve supplier is waiting to get there inventory back up for 40 plus different engines, including AMC.

Glad I'm a hoarder when it comes to parts, since this COVID thing is a nightmare.
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Joined: Nov/05/2008
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Points: 1578 		Post Options Post Options   Thanks (0) Thanks(0)   Quote amc67rogue Quote  Post ReplyReply Direct Link To This Post Posted: May/24/2021 at 6:35pm
BB Chevy main housing bores are the same size as AMCs .
Keith Coggins 67Rogue X code
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WesternRed View Drop Down
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Joined: Aug/03/2010
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Points: 5796 		Post Options Post Options   Thanks (0) Thanks(0)   Quote WesternRed Quote  Post ReplyReply Direct Link To This Post Posted: May/24/2021 at 6:37pm
Would be good if we could get some minus 40 mains again, maybe even sizes beyond that.
I've finally given up drinking for good...........now I only drink for evil.
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Joined: Nov/24/2009
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Points: 1660 		Post Options Post Options   Thanks (0) Thanks(0)   Quote bbgjc Quote  Post ReplyReply Direct Link To This Post Posted: May/24/2021 at 7:15pm
We can. King Bearing goes all the way down to 60 under for the 401's/ 70 390.
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WesternRed View Drop Down
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Points: 5796 		Post Options Post Options   Thanks (0) Thanks(0)   Quote WesternRed Quote  Post ReplyReply Direct Link To This Post Posted: May/24/2021 at 9:26pm
Cool, that will make life easier, I have some sad cranks that new a lot of work.
I've finally given up drinking for good...........now I only drink for evil.
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mark09 View Drop Down
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Joined: Dec/14/2012
Location: indiana
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Points: 281 		Post Options Post Options   Thanks (0) Thanks(0)   Quote mark09 Quote  Post ReplyReply Direct Link To This Post Posted: May/25/2021 at 8:37am
Maybe I'm just that old but we used to weld up and turn down, nitride and run with correct bearings. Put back in car go racing. Is there any reason to not do this now?
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Steve_P View Drop Down
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Points: 3803 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Steve_P Quote  Post ReplyReply Direct Link To This Post Posted: May/25/2021 at 9:01am
obviously money.  Welding up and grinding 5 mains would probably cost more than 5X as much as just grinding them.  Get a quote and let us know.
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mark09 View Drop Down
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Points: 281 		Post Options Post Options   Thanks (0) Thanks(0)   Quote mark09 Quote  Post ReplyReply Direct Link To This Post Posted: May/25/2021 at 9:12am
Usually it was only 6-8 rod journal, back then about $100 for all. 
After several times I went to a 8 quart pan and had no more problems. 
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