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Conversion:318/904 to 340/727 #572366 01/04/10 02:48 PM 01/04/10 02:48 PM
Joined: Jun 2003 Posts: 204 Valley of the Sun, AZ C cudagerry OP enthusiast
cudagerry OP enthusiast C Joined: Jun 2003 Posts: 204 Valley of the Sun, AZ	I do not have a flex plate or torque converter for the 340/727. Will the ones from the 318/904 work? (This is a fairly mild 340 build.) Oh, and what about the trans shifter linkages, are they the same?

Re: Conversion:318/904 to 340/727 [Re: cudagerry] #572367 01/04/10 03:57 PM 01/04/10 03:57 PM
Joined: Apr 2007 Posts: 2,826 NY usa 5 540challenger master
540challenger master 5 Joined: Apr 2007 Posts: 2,826 NY usa	Quote: I do not have a flex plate or torque converter for the 340/727. Will the ones from the 318/904 work? (This is a fairly mild 340 build.) Oh, and what about the trans shifter linkages, are they the same? The flexplate will bolt on the motor. But the bolt pattern on the convetor might be different The B/M flexplate is a nice fix for that. uit has both bolt patterens on it. The convertor won't 904 and 727 use have different amount of splines on the input shafts. Also what year 340? some were internal others were enternally balanced. the shift linkage will work on both 904/727 also the drive shaft will nned a new yoke and to be cut down. The 727 is longer and has a different spline. Last edited by 540challenger; 01/04/10 03:59 PM.

Re: Conversion:318/904 to 340/727 [Re: cudagerry] #572368 01/04/10 04:03 PM 01/04/10 04:03 PM
Joined: Jan 2003 Posts: 2,111 Bowie, MD R Reggie top fuel
Reggie top fuel R Joined: Jan 2003 Posts: 2,111 Bowie, MD	Driver's side block mounting lugs are a bit closer together on a 340 but they can be adapted to the 318 bracket with either a spacer or washers.

Re: Conversion:318/904 to 340/727 [Re: Reggie] #572369 01/04/10 06:41 PM 01/04/10 06:41 PM
Joined: Oct 2008 Posts: 492 South Jersey, NJ D DragDart360 mopar
DragDart360 mopar D Joined: Oct 2008 Posts: 492 South Jersey, NJ	Why not just use the 904 and existing parts and you have a bolt in assembly? The 904 will easily handle most street driven 340's. 904 Equipped 70 Dart Swinger, 2850 lbs SB 408, Bullet roller 264/268 @50 .636 SSDS stage 2 Edelbrock heads, 1 7/8 Headmans, 1050 dominator by Dom, 9.867 @ 133

Re: Conversion:318/904 to 340/727 [Re: DragDart360] #572370 01/04/10 09:17 PM 01/04/10 09:17 PM
Joined: Jun 2003 Posts: 204 Valley of the Sun, AZ C cudagerry OP enthusiast
cudagerry OP enthusiast C Joined: Jun 2003 Posts: 204 Valley of the Sun, AZ	Now that's a thought. I have a rebuilt 727, I guess I could just refresh the 904, it was working fine other than the typical leak(s). Then, if I wanted, I could put in the 8 3/4 rear and the 727 at the same time. It's for a 70 Barracuda, I guess I just always had it in my mind that the 727 and 8 3/4 was the way to go for the higher performance applications. Say, doesn't the 904 have a shorter 1st gear ratio also?

Re: Conversion:318/904 to 340/727 [Re: cudagerry] #572371 01/04/10 10:52 PM 01/04/10 10:52 PM
Joined: May 2003 Posts: 15,487 Florida S scratchnfotraction I Live Here
scratchnfotraction I Live Here S Joined: May 2003 Posts: 15,487 Florida	yes it does...takes less HP to turn the 904 also wouldnt use a lopo lock up 904 for a performance rig though A999 from a truck/van/cop car/5th ave would be a heavy duty unit

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