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Turbo Toad
PostPosted: Thu Feb 23, 2012 6:40 pm 
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I have a 73 motor and trans and I bought a 904 BM six bolt zero balance flex plate thinking it would bolt up to my crank flange NO LUCK
My question is what are my options for flex plates? This is for my turbo build and I hoping to make around 450 to 500 hp at the crank with a 3200 stall and a rev manual vavle body 904 also I'm running 2.94 suregrip 8.75 rear
I'll have to get some measurements of the torque converter distance between the bolt mounts for the flex plate in the morning
Thanks Aaron

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Turbo Toad
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PostPosted: Thu Feb 23, 2012 9:00 pm 
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I think I got the answer to my question on FABO there's only one bolt hole different on the small block crank flange and I can drill a new hole on the flex plate and weld the gap up sound right?
Thanks again KID
AARON

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bigslant6fan
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PostPosted: Fri Feb 24, 2012 4:45 pm 
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Yes, me ,Slantzilla, and others have done the same thing,you'll have one hole shaped like a figure "8" . I bolted the two flex plates together with unthreaded shank bolts and washer stacks. Then drilled the needed hole undersize,then inlarged as needed with a round file.

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Turbo Toad
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PostPosted: Fri Feb 24, 2012 6:28 pm 
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Yes, me ,Slantzilla, and others have done the same thing,you'll have one hole shaped like a figure "8" . I bolted the two flex plates together with unthreaded shank bolts and washer stacks. Then drilled the needed hole undersize,then inlarged as needed with a round file.
I. Just got done doing it the same way u stated above thanks
Aaron

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ceej
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PostPosted: Fri Feb 24, 2012 10:48 pm 
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Lots of folks do the same thing, welding up the hole. Not critical. Shouldn't make any difference at the engine speeds a slant keeps the rods enclosed at.

CJ

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Turbo Toad
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PostPosted: Fri Feb 24, 2012 11:41 pm 
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Here's how I did mine
Image
Image
U can see the new bolt hole in the second pic
Aaron

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Dart270
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PostPosted: Mon Feb 27, 2012 6:43 am 
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Yep, been there done that!

Lou

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Turbo Toad
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PostPosted: Mon Feb 27, 2012 7:50 am 
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Lou I haven't had a chance to check to see about the oil pan pick up but I do still need one ill do some research in the next day or too and let you no
Aaron

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bigslant6fan
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PostPosted: Mon Feb 27, 2012 6:36 pm 
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The flexplate in your pic looks like the wrong one. It looks like the larger 727 one that will not clear the bellhousing and starter on a 904.

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