Its motor quiz time help!
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Junior User
Joined: Feb 2008
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From: Colorado
Its motor quiz time help!
If some of you recall I asked which type of motor setup I should do to my old 360 in my 72 ford. Well I have somewhat made a decesion but now I have some questions with this decision. I want to make the motor a 390 definetly now heres the questions. I need to find a 390 crankshaft so if anyone has suggestions on a used or new crankshaft for a 390 please let me know since they seem to be hard to find now a day. So if all goes well and for now focusing on the bottom end do I need to get different main and rod bearing caps as well to acommodate for the new crank? And last question about the bottom end would be should I upgrade to hypereutectic pistons? I think my cast iron pistons are good but they are orginal so im a little unsure of the condition that they are in. Thanks!
Fleet Mechanic
Joined: Dec 2006
Posts: 1,338
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From: UPSTATE NY
i thought about doing this too. but i think if your gonna go through all that trouble tearing the motor apart you might as well do everything fresh. like take your heads and get them refurbished, as well as hone all the cylinders and put new rings, etc....
i happen to have compression thats within standards and only 1 valve/seal in question on cylinder 7 which makes smoke only in the morning when i start it. so if it aint broke dont fix it i say, and im not gonna touch it until it kicks the bucket. and with it being a ford its going to be a long long time before that happens.
i happen to have compression thats within standards and only 1 valve/seal in question on cylinder 7 which makes smoke only in the morning when i start it. so if it aint broke dont fix it i say, and im not gonna touch it until it kicks the bucket. and with it being a ford its going to be a long long time before that happens.
Ford Parts Specialist
Joined: Nov 2006
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From: Simi Valley, CA
C8AZ-6010-C .. Bare Block / Includes main caps (which were not available separately) / Fits: 1968/76 360/390.
360/390: The bore is 4.05" / 360 stroke: 3.50" / 390 stroke" 3.78"
Besides the 390 crank, you will also need 390 rods and pistons (the piston rings are the same 360/390).
390 crank marked: 2U or 3U on a crank journal.
Ford's authorized engine rebuilders also stamped the ID code(s) on the nose of the crankshaft.
I once toured Tomadur Engine in LA aka GPD (Genuine Parts Distributors). This was FoMoCo's authorized rebuilder for the West Coast.
100's of different crankshafts were stacked up in racks with the nose pointed out with ID numbers stamped on them.
360/390: The bore is 4.05" / 360 stroke: 3.50" / 390 stroke" 3.78"
Besides the 390 crank, you will also need 390 rods and pistons (the piston rings are the same 360/390).
390 crank marked: 2U or 3U on a crank journal.
Ford's authorized engine rebuilders also stamped the ID code(s) on the nose of the crankshaft.
I once toured Tomadur Engine in LA aka GPD (Genuine Parts Distributors). This was FoMoCo's authorized rebuilder for the West Coast.
100's of different crankshafts were stacked up in racks with the nose pointed out with ID numbers stamped on them.
Posting Guru
Joined: Dec 2007
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From: London, Ontario Canada
hey 1972fordf-100 its me BrentHenry1989 from youtube, just say this thread and wanted to see how your truck is coming along, you should make video of the current state of your 72, i have missed seeing that old girl, anyways i am glad your getting help on here, and ask number dummy anything, the guy is a ford genius and he knows his stuff, and good luck with the 360 to 390 and i bet the 72 drive line is making you do a 360 lol no pun intended! talk to ya later! and see ya on the tube!
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Junior User
Joined: Feb 2008
Posts: 61
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From: Colorado
i thought about doing this too. but i think if your gonna go through all that trouble tearing the motor apart you might as well do everything fresh. like take your heads and get them refurbished, as well as hone all the cylinders and put new rings, etc....
i happen to have compression thats within standards and only 1 valve/seal in question on cylinder 7 which makes smoke only in the morning when i start it. so if it aint broke dont fix it i say, and im not gonna touch it until it kicks the bucket. and with it being a ford its going to be a long long time before that happens.
i happen to have compression thats within standards and only 1 valve/seal in question on cylinder 7 which makes smoke only in the morning when i start it. so if it aint broke dont fix it i say, and im not gonna touch it until it kicks the bucket. and with it being a ford its going to be a long long time before that happens.
Thread Starter
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Junior User
Joined: Feb 2008
Posts: 61
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From: Colorado
hey 1972fordf-100 its me BrentHenry1989 from youtube, just say this thread and wanted to see how your truck is coming along, you should make video of the current state of your 72, i have missed seeing that old girl, anyways i am glad your getting help on here, and ask number dummy anything, the guy is a ford genius and he knows his stuff, and good luck with the 360 to 390 and i bet the 72 drive line is making you do a 360 lol no pun intended! talk to ya later! and see ya on the tube!
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Junior User
Joined: Feb 2008
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From: Colorado
Does this place still exist? and can I get the rods from these people as well? I think I have found a set of hypereuntectic pistons for the motor but Im still debating if I want to get these yet or not.
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Posting Guru
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Ford Parts Specialist
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From: Simi Valley, CA
Dunno if they're still there or not, but they didn't sell to the public, only to the dealers.
Posting Guru
Joined: Oct 2006
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From: nunya
Where do you live? 390 stuff out here in SoCal is almost unlimited. Check with your local/surrounding machine shops for the crank and rods. Good Luck.
-Lance
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From: Colorado
-Richard
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Joined: Jun 2004
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From: Sacramento, CA.
If you are going to buy a 390 crank and rods and pay for the cores, then look at the new stuff that companies like Scat is making now. It may be cheaper to go with the new stuff. And remember you need 390 pistons also.