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Thread: Decked Block - Strange Looking Artifacts

  1. #1
    GooGooG'Joob Quincy's Avatar
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    Default Decked Block - Strange Looking Artifacts

    I just got my '79 351W block back from my friend's machine shop. I had him deck it down to 9.460" (.020" less than an early block). I didn't notice anything unusual when I picked it up; I saw it later when I got home and put it on the stand. He probably can explain, but figured I'd ask here first. Remember this is my first "Phord" build... ;-)

    There are three or four spots (I'll go back and take a pic later if I have to) about .25" diameter on each bank around the inboard cylinders that look like they were plugged or welded. You can just barely see a round shadow and indication of slightly dissimilar metal in the freshly machined surface. There was no evidence of this when I pulled off the heads, I cleaned off the old gasket and sconge with a blade, but I didn't clean it spotlessly. I don't think this block has ever been decked before, it was nominal for a 9.503" smogger. Were there some extra coolant holes that were maybe filled in by Ford or someone else along the way? This was a totally stock (but once rebuilt by person(s) unknown) motor with the factory '79 "wheez-O-matic" D8OE heads. Nuthin' special...

    I don't think it's gonna make a bit of difference, but I'm just curious.
    Last edited by Quincy; 03-08-2021 at 08:49 PM.

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  2. #2
    P31 Pursuit Car Brown_Muscle's Avatar
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    I'm not exactly sure what you mean, if you could take pictures it would help. I didn't have anything like you're describing on my 82 or 96 block, as far as i know
    -Phil



    +1982 Ford LTD-S Police Car. 351w, GT40 Heads, Edelbrock 1906 Carb, Full exhaust headers to tails. 3.27 Trac-Lok Rear. Aluminum Police Driveshaft. Speedway Springs+Bilstein Shocks, Intermediate Brakes, Baumann Shift kit.

    +2003 Acura CL Type S 6-speed

  3. #3
    GooGooG'Joob Quincy's Avatar
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    Quote Originally Posted by Brown_Muscle View Post
    I'm not exactly sure what you mean, if you could take pictures it would help. I didn't have anything like you're describing on my 82 or 96 block, as far as i know
    Yeah, I'll do that later. I know yours doesn't have, I looked at your extremely high-resolution pics and zoomed in! I don't know if my camera's going to pick them up, but we'll see. By the way, my coolant hole layout seems exactly like yours, going by memory. I DID notice there are some holes in that gasket you're using pretty much exactly where I'm seeing these strange looking areas. I haven't gotten my gaskets yet, probably going to use the Edelbrocks since I'm running their RPM heads.

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    It's no biggy, i really dont know what they are, i assume it is a joint line between some casting cores in how they assemble in the mold cavity.

    9.485 deck height on a D4 block.
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  5. #5
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    Fresh D1 block on marketplace, you can see them too. https://www.facebook.com/marketplace...2053584574630/

  6. #6
    P31 Pursuit Car Brown_Muscle's Avatar
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    they were on my 82 block as well
    -Phil



    +1982 Ford LTD-S Police Car. 351w, GT40 Heads, Edelbrock 1906 Carb, Full exhaust headers to tails. 3.27 Trac-Lok Rear. Aluminum Police Driveshaft. Speedway Springs+Bilstein Shocks, Intermediate Brakes, Baumann Shift kit.

    +2003 Acura CL Type S 6-speed

  7. #7
    GooGooG'Joob Quincy's Avatar
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    Thanks, everyone. According to my friend @ the machine shop, they see them all the time on Ford blocks. Nobody really seems to know what they are, I was thinking something as JeffBoudah suggested. Pardon me, I'm just not used to Ford strangeness, superior old-school (50's/60's/70's) Chrysler engineering is my usual "wheelhouse".... ;-)

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