BBC Motor Plate Drawings
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BBC Motor Plate Drawings

  1. #1
    Large Member edog's Avatar
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    Default BBC Motor Plate Drawings

    I was bored today so I created a couple parts in SolidWorks. I have not made the front left or, I guess it would be the front drivers side. The info I was given had different numbers for the right front and left front. I was not sure if the hole locations are the same or not. The drawings are over sized so a person could make the needed adjustments to fit their application. I would also like to add the mounting locations for a top mount starter. I do not have any of that information. It would be real easy to make another plate and drawing for a top mount starter and remove all the cut outs for the stock starter location. Any info or idea's would be appreciated.







    Last edited by edog; 01-30-2010 at 11:01 AM.

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    Senior Member Futs's Avatar
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    heres the drawings i have eric.



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    Senior Member Oldsquirt's Avatar
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    Quote Originally Posted by edog View Post
    I have not made the front left or, I guess it would be the front drivers side. The info I was given had different numbers for the right front and left front. I was not sure if the hole locations are the same or not.
    The holes on the lower front of block are spaced differently on right and left.

    Quote Originally Posted by Futs View Post
    heres the drawings i have eric.
    Courtesy of the 1994 edition of "Chevy Power" found at my local GMPP dealer.

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    Large Member edog's Avatar
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    Quote Originally Posted by Futs View Post
    heres the drawings i have eric.
    Those are the same files I used. I was confused by the 2.12 number on the left, but there is no dimension on the right. Those holes are off a little, and I was not sure. Thanks

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    Large Member edog's Avatar
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    Quote Originally Posted by Oldsquirt View Post
    The holes on the lower front of block are spaced differently on right and left.
    Thanks. I will get the other side finished, and get the numbers tuned up, then send it off to the laser guy, and maybe save myself some time.
    Last edited by edog; 01-29-2010 at 11:03 PM.

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    Bostick Racing Engines six-oh-nine's Avatar
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    I can send you a mastercam file if you wish, or I can just give you the dimensions....

    Based on crankshaft centerline the four mounting holes are:
    X -5.610, Y 3.120
    X -5.700, Y 1.000
    X 5.155, Y 3.230
    X 5.440, Y 1.000

    Hope this helps...
    The Bostick®

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    Large Member edog's Avatar
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    Quote Originally Posted by six-oh-nine View Post
    I can send you a mastercam file if you wish, or I can just give you the dimensions....

    Based on crankshaft centerline the four mounting holes are:
    X -5.610, Y 3.120
    X -5.700, Y 1.000
    X 5.155, Y 3.230
    X 5.440, Y 1.000

    Hope this helps...
    Those numbers will work. Thank You.

    I am not familar with all the variations of GM blocks. Did the bell housing holes change over the years?

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    Bostick Racing Engines six-oh-nine's Avatar
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    Quote Originally Posted by edog View Post
    Those numbers will work. Thank You.

    I am not familar with all the variations of GM blocks. Did the bell housing holes change over the years?
    Nope... well... not really...

    Small blocks actually can use the top center hole whereas big blocks only use the 6 others... on LS engines they use the same pattern, only the top center hole is used and one of the second row of holes is deleted... so with that said... damn near all small and big blocks, LS, 90* V6, and Iron Duke 4cyl rear motor plates are interchangeable. If I left one out... sorry. If I remember correctly... (without actually looking) the Olds, Pointiac and Buick use the same dowel pin location and some bolt holes the same... the top is way different though. On this I may be wrong... as far as the bolt hole for the BPO engines... but dowel pin location I am certain.


    Only Ford uses 83 different bellhousing/flexplate combos for 6 different engines.Ford
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    burnt mexican incorprated mirrorimage's Avatar
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    Quote Originally Posted by six-oh-nine View Post
    Nope... well... not really...

    Small blocks actually can use the top center hole whereas big blocks only use the 6 others... on LS engines they use the same pattern, only the top center hole is used and one of the second row of holes is deleted... so with that said... damn near all small and big blocks, LS, 90* V6, and Iron Duke 4cyl rear motor plates are interchangeable. If I left one out... sorry. If I remember correctly... (without actually looking) the Olds, Pointiac and Buick use the same dowel pin location and some bolt holes the same... the top is way different though. On this I may be wrong... as far as the bolt hole for the BPO engines... but dowel pin location I am certain.


    Only Ford uses 83 different bellhousing/flexplate combos for 6 different engines.Ford
    like awalys you da man.... now all i need for my ford is a flux capacitor and ill be in there... ..and a newboat to...
    WHAT THE HELL WAS THAT !!! !

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    Senior Member Xerophobic's Avatar
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    You gotta love Solidworks
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    Large Member edog's Avatar
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    Quote Originally Posted by Xerophobic View Post
    You gotta love Solidworks
    Did you create those parts? Very nice!!!

  14. #12
    Large Member edog's Avatar
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    A little more progress. I ran out of dimensions for the block so I made a gerneric block. That way I could get the distance to layout the angle. My assmblies are no where as cool as Xerophobic's but I can do what I need to do with em.



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    B.A.M aka "Black Azz Mike 396_Ways_To_Spit's Avatar
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    Nice work!!! I have the actual tech design somewhere in my folders. Let me see if I can dig them up. SOmeone posted them on HotBoat back in the day so I copied them. They are dead nutz! I should have the front and rear specs....
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    Senior Member Rain Maker MN's Avatar
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    I know you are talking Chevy's...

    Anyone have a CAD file for BBF 460 motor plates?

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