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360 magnum/904 balance list #740363 07/04/10 06:15 PM 07/04/10 06:15 PM
Joined: Jan 2004 Posts: 684 Colorado S swingers_rock OP super gas
swingers_rock OP super gas S Joined: Jan 2004 Posts: 684 Colorado	Hi guys im getting ready to mate my 360 magnum to my 904 and was wondering if these parts will get me up and running. flexplate harmonic balancer torque converter weights Thanks

Re: 360 magnum/904 balance list [Re: swingers_rock] #740364 07/04/10 08:39 PM 07/04/10 08:39 PM
Joined: Jan 2003 Posts: 9,826 las vegas 70AARcuda master
70AARcuda master Joined: Jan 2003 Posts: 9,826 las vegas	the flexplate says it is for an externally balanced 360 1993-1999...You dont need the weights on the converter.. I believe B&M quit making the 10241,,,,, B&M 10241 Flexplate. Fits 1993-1999, Chrysler externally balanced 360 with A-904. (10" bolt circle) SFI approved flexplates from B & M are legal for use in all classes of NHRA and IHRA drag racing. They are also ideal for high performance street use or any application that may see higher than 6,000 rpm. They come with the SFI certification sticker and will not need recertification for three years Last edited by 70AARcuda; 07/04/10 08:43 PM. Tony 70 AARCuda Vitamin C 71 Dart Swinger 360 10.318 @ 128.22(10-04-14 Bakersfield) 71 Demon 360 10.666 @122.41 (01-29-17 @ Las Vegas) 71 Duster 408 (10.29 @ 127.86 3/16/19 Las Vegas)

Re: 360 magnum/904 balance list [Re: 70AARcuda] #740365 07/04/10 10:37 PM 07/04/10 10:37 PM
Joined: Jul 2003 Posts: 6,167 Maryland GO_Fish master
GO_Fish master Joined: Jul 2003 Posts: 6,167 Maryland	stock 5.9 harmonic balancer is what you need. Ideally, the correct B&M flex plate will not require any converter weights (neutral balance). Don't know if B&M still makes the part you need. Scott B. "I'm a self-made man... I started with nothing, and I still have most of it!" 68 360 rusty B'cuda 'vert (GO Fish)13.59@ 98.72 mph 69 340 GTS stock 14.18@ 95.60 mph 01 5.9L Ram 1500 Quad Cab 4x4 01 3.5L 300M 16.23@ 86.97 mph

Re: 360 magnum/904 balance list [Re: GO_Fish] #740366 07/04/10 10:56 PM 07/04/10 10:56 PM
Joined: Jan 2004 Posts: 684 Colorado S swingers_rock OP super gas
swingers_rock OP super gas S Joined: Jan 2004 Posts: 684 Colorado	I believe that B&M flexplate is on back stocked on that internet site, so I will probably get that and the stock 5.9 balancer and I should be set.

Re: 360 magnum/904 balance list [Re: swingers_rock] #740367 07/05/10 12:36 AM 07/05/10 12:36 AM
Joined: Feb 2005 Posts: 5,221 Branson, Mo. J joedust451 super gas
joedust451 super gas J Joined: Feb 2005 Posts: 5,221 Branson, Mo.	Quote: I believe that B&M flexplate is on back stocked on that internet site, so I will probably get that and the stock 5.9 balancer and I should be set. Flexplate is "discontinued", i called B&M on this, i asked why, they said its because most are useing 727s anymore, sales were way down, so its a gone-rrrr. All he needs if he's going to use a stock factory shortblock is a flexplate from a later model 360 magnum that has the weights on it, then he can run a "N" balanced converter, then just run a factory HB. 75 Duster, 451 10.87 @ 123.58 NA 97 Z28 6sp., 12.01 @ 115 on a 100 shot 71 Swinger. 360 magnum. 12.58 @ 105 78 cutlass, 469 BBC. 12.70 @ 108 on street tires. http://www.youtube.com/watch?v=Z2kqNmMfheU

Re: 360 magnum/904 balance list [Re: joedust451] #740368 07/05/10 01:35 AM 07/05/10 01:35 AM
Joined: Jan 2003 Posts: 9,826 las vegas 70AARcuda master
70AARcuda master Joined: Jan 2003 Posts: 9,826 las vegas	the 727 flexplate comes with 3 different bolt patterns... 11 1/8 and 10 inch...plus different bolt hole sizes...i dont see why it would not work. check the bolt pattern on your converter...see if it is either of those two. Tony 70 AARCuda Vitamin C 71 Dart Swinger 360 10.318 @ 128.22(10-04-14 Bakersfield) 71 Demon 360 10.666 @122.41 (01-29-17 @ Las Vegas) 71 Duster 408 (10.29 @ 127.86 3/16/19 Las Vegas)

Re: 360 magnum/904 balance list [Re: 70AARcuda] #740369 07/05/10 09:39 AM 07/05/10 09:39 AM
Joined: Jan 2005 Posts: 3,699 Newport, Mi Evil Spirit master
Evil Spirit master Joined: Jan 2005 Posts: 3,699 Newport, Mi	Quote: the 727 flexplate comes with 3 different bolt patterns... 11 1/8 and 10 inch...plus different bolt hole sizes...i dont see why it would not work. check the bolt pattern on your converter...see if it is either of those two. I'm pretty sure the larger dia of the 727 flexplate will hit the starter in the drive area. Even using the B&M 360/904 flexplate, I've had to trim the nose on some mini-starters to clear. I've also had to trim the block in the pan rail area to put a 904 behind a 360 Mag block. Free advice and worth every penny... Factory trained Slinky rewinder.........

Re: 360 magnum/904 balance list [Re: 70AARcuda] #740370 07/05/10 10:45 AM 07/05/10 10:45 AM
Joined: Jun 2008 Posts: 10,847 Oakdale CT gdonovan I Live Here
gdonovan I Live Here Joined: Jun 2008 Posts: 10,847 Oakdale CT	I'll post some pics in a few minutes.

Re: 360 magnum/904 balance list [Re: Evil Spirit] #740371 07/05/10 02:29 PM 07/05/10 02:29 PM
Joined: Jun 2008 Posts: 10,847 Oakdale CT gdonovan I Live Here
gdonovan I Live Here Joined: Jun 2008 Posts: 10,847 Oakdale CT	B&M 10242 (5.9 magnum) Flexplate shown with 904, 727 and magnum flexplates. I see no reason why the 10242 would not work with the 904 even though it is listed for 727 applications. NOTE- Not all magnum flexplates are the same! Early units had the 5.9 weight attached to the converter, later ones were attached to the flexplate. 6070014-DSCN2341.JPG (736 downloads)

Re: 360 magnum/904 balance list [Re: gdonovan] #740372 07/05/10 02:30 PM 07/05/10 02:30 PM
Joined: Jun 2008 Posts: 10,847 Oakdale CT gdonovan I Live Here
gdonovan I Live Here Joined: Jun 2008 Posts: 10,847 Oakdale CT	B&M flexplate with 904 overlaid. 6070016-DSCN2339.JPG (540 downloads)

Re: 360 magnum/904 balance list [Re: gdonovan] #740373 07/05/10 02:31 PM 07/05/10 02:31 PM
Joined: Jun 2008 Posts: 10,847 Oakdale CT gdonovan I Live Here
gdonovan I Live Here Joined: Jun 2008 Posts: 10,847 Oakdale CT	B&M flexplate with 727 overlaid. 6070019-DSCN2340.JPG (612 downloads)

Re: 360 magnum/904 balance list [Re: gdonovan] #740374 07/05/10 05:01 PM 07/05/10 05:01 PM
Joined: Jan 2003 Posts: 25,785 Rio Linda, CA John_Kunkel Too Many Posts
John_Kunkel Too Many Posts Joined: Jan 2003 Posts: 25,785 Rio Linda, CA	The 904 usesa 122 tooth ring gear, the 727 uses a 130 tooth ring gear. The smaller diameter of the 904 ring gear prevents using a 727 flexplate. The INTERNET, the MISinformation superhighway

Re: 360 magnum/904 balance list [Re: John_Kunkel] #740375 07/05/10 05:09 PM 07/05/10 05:09 PM
Joined: Jun 2008 Posts: 10,847 Oakdale CT gdonovan I Live Here
gdonovan I Live Here Joined: Jun 2008 Posts: 10,847 Oakdale CT	Quote: The 904 usesa 122 tooth ring gear, the 727 uses a 130 tooth ring gear. The smaller diameter of the 904 ring gear prevents using a 727 flexplate. Interesting, I'll have to do a test fit with the 42RH I have here. This could be a problem for me as I was doing a motor swap next month. Question- Does anyone make interal balanced flexplates for the 904 application with a six bolt crank? I'm amazed B&M does not have one listed! I'd simply get it rebalanced for a magnum 5.9.

Re: 360 magnum/904 balance list [Re: gdonovan] #740376 07/05/10 05:40 PM 07/05/10 05:40 PM
Joined: Jan 2004 Posts: 684 Colorado S swingers_rock OP super gas
swingers_rock OP super gas S Joined: Jan 2004 Posts: 684 Colorado	Thanks for the pictures gdonovan. Would have have a weighted stock 5.9 flexplate for sale?

Re: 360 magnum/904 balance list [Re: swingers_rock] #740377 07/05/10 06:33 PM 07/05/10 06:33 PM
Joined: Jun 2008 Posts: 10,847 Oakdale CT gdonovan I Live Here
gdonovan I Live Here Joined: Jun 2008 Posts: 10,847 Oakdale CT	Quote: Thanks for the pictures gdonovan. Would have have a weighted stock 5.9 flexplate for sale? I do not.

Re: 360 magnum/904 balance list [Re: gdonovan] #740378 07/05/10 07:14 PM 07/05/10 07:14 PM
Joined: Jun 2008 Posts: 10,847 Oakdale CT gdonovan I Live Here
gdonovan I Live Here Joined: Jun 2008 Posts: 10,847 Oakdale CT	Took a picture of the B&M flexplate over a 42RH (904) converter. My Mark One eyeball tells me there is about .030-.045 between the outside of the flexplate and the lowest valley of the ring gear. Guess the only way to find out if it will work or not is to mock everything up. 6070455-DSCN2343.JPG (350 downloads)

Re: 360 magnum/904 balance list [Re: swingers_rock] #740379 07/06/10 07:41 AM 07/06/10 07:41 AM
Joined: Nov 2006 Posts: 1,086 Baton Rouge, La. StandOnIt super stock
StandOnIt super stock Joined: Nov 2006 Posts: 1,086 Baton Rouge, La.	Quote: Thanks for the pictures gdonovan. Would have have a weighted stock 5.9 flexplate for sale? When I did my stroker magnum build I used a B&M flexplate to my 904 trans. I will look today to see if I stil have my old flexplate and if its weighted. 76' Volare, 5.9 magnum w/Iron heads. New best 10.68 at 123 mph 1/4 mile.

Re: 360 magnum/904 balance list [Re: joedust451] #740380 07/06/10 08:03 AM 07/06/10 08:03 AM
Joined: Jan 2003 Posts: 16,123 Grand Haven, MI patrick I Live Here
patrick I Live Here Joined: Jan 2003 Posts: 16,123 Grand Haven, MI	Quote: Quote: I believe that B&M flexplate is on back stocked on that internet site, so I will probably get that and the stock 5.9 balancer and I should be set. Flexplate is "discontinued", i called B&M on this, i asked why, they said its because most are useing 727s anymore, sales were way down, so its a gone-rrrr. All he needs if he's going to use a stock factory shortblock is a flexplate from a later model 360 magnum that has the weights on it, then he can run a "N" balanced converter, then just run a factory HB. will it work? all 360 mags came with a 727 based tranny (some vans got a 727 (37RH), most came with a 46RH/RE (A518) 1976 Spinnaker White Plymouth Duster, /6 A833OD 1986 Silver/Twilight Blue Chrysler 5th Ave HotRod SOLD!* 2011 Toxic Orange Dodge Charger R/T 2017 Grand Cherokee Overland 2014 Jeep Cherokee Latitude (holy crap, my daughter is driving)

Re: 360 magnum/904 balance list [Re: joedust451] #740381 07/06/10 03:24 PM 07/06/10 03:24 PM
Joined: Jan 2003 Posts: 25,785 Rio Linda, CA John_Kunkel Too Many Posts
John_Kunkel Too Many Posts Joined: Jan 2003 Posts: 25,785 Rio Linda, CA	Quote: All he needs if he's going to use a stock factory shortblock is a flexplate from a later model 360 magnum that has the weights on it, then he can run a "N" balanced converter, When the factory changed to a weighted flexplate they also changed to a symmetric 90� converter bolt pattern, the 727 and 904 converters have one drive lug offset so the newer flexplate won't work on the 904 without elongating one hole. The INTERNET, the MISinformation superhighway

Re: 360 magnum/904 balance list [Re: John_Kunkel] #740382 07/06/10 05:08 PM 07/06/10 05:08 PM
Joined: Jul 2003 Posts: 6,167 Maryland GO_Fish master
GO_Fish master Joined: Jul 2003 Posts: 6,167 Maryland	Quote: Quote: All he needs if he's going to use a stock factory shortblock is a flexplate from a later model 360 magnum that has the weights on it, then he can run a "N" balanced converter, When the factory changed to a weighted flexplate they also changed to a symmetric 90� converter bolt pattern, the 727 and 904 converters have one drive lug offset so the newer flexplate won't work on the 904 without elongating one hole. With the weighted flexplate and a symmetric pattern, what stops you from mounting it in the wrong orientation?? Scott B. "I'm a self-made man... I started with nothing, and I still have most of it!" 68 360 rusty B'cuda 'vert (GO Fish)13.59@ 98.72 mph 69 340 GTS stock 14.18@ 95.60 mph 01 5.9L Ram 1500 Quad Cab 4x4 01 3.5L 300M 16.23@ 86.97 mph

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