Fe Block thickness
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New User
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Fe Block thickness
Is there a rule of thumb that has been learned from past sonic testing that can be shared. Pickup truck 360 blocks vs street car 390 blocks ect. Does a certain model seem to have more core shift than another? Thanks
Cargo Master
Joined: Apr 2001
Posts: 2,697
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From: Vancouver
The rule of thumb is that the 360 and '65 up 390 (and the short-lived 410) used the same block. The 352 is a different story. It is presumed by many, including me, that the 4.00" bore 352 has thicker cylinders and is essentially an "underbored" 390, but others disagree.
Eric
Eric
Last edited by 6t6merc; Jul 12, 2014 at 07:06 PM. Reason: incomplete
Senior User
Joined: Jul 2003
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Its not as simple as car vs. truck. Google search "FE drill bit test" or read up in the FE forum, here is an example: https://www.ford-trucks.com/forums/6...st-rehash.html
Lead Driver
Joined: Aug 2003
Posts: 7,592
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From: **** hole San Jose ca.
Gees to much here say and not really enough true input per facts.
Block shift from 332,352,360,361,390,391,406,,427,428' not one person has the correct answers. Best at guessing ball part answers. as the blocks were made in many places along with the replacement service mirror 105 blocks as being thicker. As these have the main bearing web block enforcements. It's really best to sonic test each block before boring it..
But back in 62, I had a 1961 390 gt block punched out to 4.1/8" ran 12.5-1 pistons with milled heads with the thin steel gaskets with a high compression of 275Lbs psi and never had any over heating troubles in my 55 ford 2dr cp. with stock 55 rad.
Orich
Block shift from 332,352,360,361,390,391,406,,427,428' not one person has the correct answers. Best at guessing ball part answers. as the blocks were made in many places along with the replacement service mirror 105 blocks as being thicker. As these have the main bearing web block enforcements. It's really best to sonic test each block before boring it..
But back in 62, I had a 1961 390 gt block punched out to 4.1/8" ran 12.5-1 pistons with milled heads with the thin steel gaskets with a high compression of 275Lbs psi and never had any over heating troubles in my 55 ford 2dr cp. with stock 55 rad.
Orich
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Ford Parts Specialist
Joined: Nov 2006
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From: Simi Valley, CA
Stroke: 3.50" / 390 = 3.78."
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New User
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105 mirror block
I have a 390 with a backwards 105 stamped on the drivers side. Can anyone tell me what this is. I was told it is a 1968 with gt heads. Thanks
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From: **** hole San Jose ca.
Orich
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