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#2496494 - 05/15/18 01:27 PM 904/727 behind a 5.7
Kid-Dart Offline
super stock

Registered: 03/22/05
Posts: 1017
Loc: Michigan
I know its not a direct bolt up but what is needed to go with a 727 and a 904 to a 5.7.
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74 Dart Sport Best to Date 10.82 in the 1/4

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#2496542 - 05/15/18 03:12 PM Re: 904/727 behind a 5.7 [Re: Kid-Dart]
RTSE4ME Offline
top fuel

Registered: 01/20/03
Posts: 1610
Loc: MD

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#2496655 - 05/15/18 07:44 PM Re: 904/727 behind a 5.7 [Re: Kid-Dart]
Kid-Dart Offline
super stock

Registered: 03/22/05
Posts: 1017
Loc: Michigan
and that was it? Cool no spacers for the convertor? last question for tonight. is there a list of required items to have on hand or that are needed. I have seen one but cant seem to find it as always
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#2496801 - 05/16/18 09:41 AM Re: 904/727 behind a 5.7 [Re: Kid-Dart]
savoy64 Offline
top fuel

Registered: 09/07/11
Posts: 1813
Loc: colorado
you have to order a torque converter-----tell them what you have and they will build it to avoid needing the sheet metal spacer....

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#2496960 - 05/16/18 07:14 PM Re: 904/727 behind a 5.7 [Re: Kid-Dart]
cbusters Offline
mopar

Registered: 05/08/05
Posts: 674
Loc: Florida
I found out after bolting it all together that the ATI Flexplate is made for Hemi Torque Convertor bolts which is a size larger than the stock 727 convertor you will likely order. The pads will have to be specified as such and also source the 4 bolts at the same time.

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#2497301 - 05/17/18 04:28 PM Re: 904/727 behind a 5.7 [Re: Kid-Dart]
John_Kunkel Offline
I Live Here

Registered: 01/20/03
Posts: 19459
Loc: Rio Linda, CA
It seems that a lot of folks were bolting up the trans without the spacer until somebody discovered that the 5.7 crank flange extended further from the block than the LA/Magnum.
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#2497326 - 05/17/18 05:52 PM Re: 904/727 behind a 5.7 [Re: Kid-Dart]
HotRodDave Offline
master

Registered: 01/29/05
Posts: 9789
Loc: Kalispell Mt.
I put a straight edge across a crank flange on both a 5.9 mag and a 5.7 hemi and the 5.7 crank mounting surface does not go out as far on the 5.7 so a spacer would make things worse not better all else being the same.

The hemi does use an 8 bolt plate instead of a 6 bolt SB pattern and the 5.7 has the same 8 bolt pattern as a 4.7. Seems like you could use the 4.7 or 5.7 flex plate and just take off the starter ring gear on the converter. Edit At least on a 727 as the ring gear is the same diameter.


Edited by HotRodDave (05/17/18 05:56 PM)
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#2497403 - 05/17/18 10:19 PM Re: 904/727 behind a 5.7 [Re: Kid-Dart]
biff426 Offline
super stock

Registered: 04/03/05
Posts: 729
Loc: Delaware
I used the ATI flexplate and a converter I had behind a bigblock and it bolted right up no spacer and no issues been this way 3 years now no issues.

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#2497435 - 05/18/18 12:32 AM Re: 904/727 behind a 5.7 [Re: Kid-Dart]
sixpackgut Offline
Drag Week Mod Champion

Registered: 06/08/03
Posts: 9066
Loc: Charleston
You can buy flexplate from mancini for $70. With one of my torque converters i needed to make a spacer, changed converter than didn't need a spacer. Changed trans and another converter and didn't need a spacer. Mock it up outside the car first


Edited by sixpackgut (05/18/18 12:32 AM)
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