400 crank swap
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Junior User
Joined: May 2002
Posts: 56
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400 crank swap
My 351M needs a rebuild, and I want to turn it into a full 400 cubes. Where can I get a 400 crank? Don't really want to buy one from a yard. Are there any 400 conversion kits available for the 351m? If so, where could I find them, and which is the best? Thanks much!
Elder User
Joined: Oct 2002
Posts: 743
Likes: 1
400 crank swap
You can get a 400 crank from about anywhere. JC Whitney even sells them. After that just get a rebuild kit for a 400 with pistons and have fun. I've heard that the timing marks on the balancer are different, I don't know about that, mine runs just fine.
Senior User
Joined: Jun 2002
Posts: 423
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From: Oklahoma
400 crank swap
I have heard some rumored negatives on their quality of late but nothing definite; but PAW (Performance Automotive Warehouse) sells lowerend kits with various levels of options. If nothing else, call your local truck salvage yard and ask for their core buyer's phone number. I picked up a restorable core for my engine for $50.
Posting Guru
Joined: Aug 2000
Posts: 2,416
Likes: 4
From: PacNW
400 crank swap
>My 351M needs a rebuild, and I want to turn it into a full
>400 cubes. Where can I get a 400 crank? Don't really want
>to buy one from a yard. Are there any 400 conversion kits
>available for the 351m? If so, where could I find them, and
>which is the best? Thanks much!
Believe it or not I found mine on eBay. It was already turned and all I did was have the machine shop give it a final polish. I paid $65 for it.
>400 cubes. Where can I get a 400 crank? Don't really want
>to buy one from a yard. Are there any 400 conversion kits
>available for the 351m? If so, where could I find them, and
>which is the best? Thanks much!
Believe it or not I found mine on eBay. It was already turned and all I did was have the machine shop give it a final polish. I paid $65 for it.
Senior User
Joined: Sep 2002
Posts: 372
Likes: 0
From: east texas
400 crank swap
Hello fellow Ford people! I was just given a 400 engine that's been setting underneath trees for quite a while. Y'all think it's worth rebulding? I wish to have another engine ready to drop in with the good stuff installed 
The intake is gone but the heads were laying right beside.
The intake is gone but the heads were laying right beside.
Hotshot
Joined: Oct 2002
Posts: 18,488
Likes: 22
From: The Big, Oregon
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Junior User
Joined: Nov 2002
Posts: 97
Likes: 0
From: Morristown USA
400 crank swap
I was given another block and pistons with my 79, it's a 400. the crank was ground .010 15k miles ago. Either I rebuild the block and it sits, or I sell the parts. so here's what I have: Pistons .030 over never been out of box, crank ground .010 under, lifters, and a whole block. One of the pistons in the block has a hole in it. A great way to either build a 400 or use the cheap parts to redo yours..
hansont@means.net
hansont@means.net
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Senior User
Joined: Dec 2001
Posts: 356
Likes: 0
From: space city
400 crank swap
just curious why you wouldn't want one from a boneyard?
i got a couple from a local place. i watched & helped them take the cranks out of the motors they were in. took a look at the bearings, all looked ok. one was std. ($35), the other was .010/.010 ($30)
it seems to me that the "safest" place for a crank to be is in the block! plus you get an idea of the history that way - they weren't sitting around rusting or getting dropped or gouged, they came out of engines that appeared to have no problems with the bottom end.
i just wish i'd known back then to look at the foundry codes on the blocks - i might have just bought the whole shortblocks instead!
is there a problem with junkyard cranks that i don't know about?
i got a couple from a local place. i watched & helped them take the cranks out of the motors they were in. took a look at the bearings, all looked ok. one was std. ($35), the other was .010/.010 ($30)
it seems to me that the "safest" place for a crank to be is in the block! plus you get an idea of the history that way - they weren't sitting around rusting or getting dropped or gouged, they came out of engines that appeared to have no problems with the bottom end.
i just wish i'd known back then to look at the foundry codes on the blocks - i might have just bought the whole shortblocks instead!
is there a problem with junkyard cranks that i don't know about?