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5.7 and the 727 pb #2399320
11/06/17 01:30 PM
11/06/17 01:30 PM
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csmopar Offline OP
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I've been trying to determine if a 5.7 hemi can mate to a small block 727 pushbutton. Has anyone tried this?

Re: 5.7 and the 727 pb [Re: csmopar] #2399391
11/06/17 03:09 PM
11/06/17 03:09 PM
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hudsonhornet7x Offline
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It will bolt right up. You just need the correct flex plate.

Re: 5.7 and the 727 pb [Re: hudsonhornet7x] #2399504
11/06/17 06:40 PM
11/06/17 06:40 PM
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sam64 Offline
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if it is pre 1965 I think the bottom pass.bolt will not line up,other than that it will work.

Re: 5.7 and the 727 pb [Re: hudsonhornet7x] #2399513
11/06/17 06:57 PM
11/06/17 06:57 PM
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csmopar Offline OP
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Originally Posted By hudsonhornet7x
It will bolt right up. You just need the correct flex plate.


Sweet thanks

Re: 5.7 and the 727 pb [Re: sam64] #2399514
11/06/17 06:57 PM
11/06/17 06:57 PM
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csmopar Offline OP
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Originally Posted By sam64
if it is pre 1965 I think the bottom pass.bolt will not line up,other than that it will work.


It's a 64

Re: 5.7 and the 727 pb [Re: csmopar] #2399550
11/06/17 07:55 PM
11/06/17 07:55 PM
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moparpollack Offline
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Are the bolts that go into the block metric?


56 Plaza 63 D100 step side 67 Coronet, 68 Roadrunner, 69 Super Bees, 69 Coronet 500 convertible, 70 Roadrunner Post, 79 D150 360, and a severe case of Mopar a,d,d
Re: 5.7 and the 727 pb [Re: csmopar] #2399624
11/06/17 10:01 PM
11/06/17 10:01 PM
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RTSE4ME Offline
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No, 3/8-16 thread I used the small block ARP bellhousing bolt kit

Re: 5.7 and the 727 pb [Re: csmopar] #2399625
11/06/17 10:01 PM
11/06/17 10:01 PM
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savoy64 Offline
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you also need that thin spacer that goes to the block---or there is a new torque converter being made to allow for that thickness....

Re: 5.7 and the 727 pb [Re: savoy64] #2399645
11/06/17 10:20 PM
11/06/17 10:20 PM
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moparmitch Offline
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Originally Posted By savoy64
you also need that thin spacer that goes to the block---or there is a new torque converter being made to allow for that thickness....


What's the thickness? I assume a mid-plate could take care of this?

Last edited by moparmitch; 11/06/17 10:44 PM.
Re: 5.7 and the 727 pb [Re: csmopar] #2399654
11/06/17 10:33 PM
11/06/17 10:33 PM
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Between a rock & a hard place
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cudadoug Offline
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Between a rock & a hard place
It will bolt right up. You just need the correct flex plate.

Doesn't the right flex plate eliminate the need for any spacers?

Re: 5.7 and the 727 pb [Re: cudadoug] #2399670
11/06/17 10:57 PM
11/06/17 10:57 PM
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sam64 Offline
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some of the first flex plate conversions used a spacer between the block and trans.because the flex plate was flat.

Re: 5.7 and the 727 pb [Re: sam64] #2399901
11/07/17 12:24 PM
11/07/17 12:24 PM
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csmopar Offline OP
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awesome thanks

Re: 5.7 and the 727 pb [Re: csmopar] #2400154
11/07/17 08:51 PM
11/07/17 08:51 PM
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savoy64 Offline
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the spacer looks like 3/64? and is used on the 5.7 and the 4.7-----a friend has done 4 of these into older mopars and has bought these off ebay i believe----i grabbed a junkyard one for him and he announced he got a torque converter that was made to delete the need for that spacer....someone here must be up on it......mopar part number 53032454AA.

Last edited by savoy64; 11/07/17 09:51 PM.
Re: 5.7 and the 727 pb [Re: csmopar] #2402449
11/12/17 01:09 PM
11/12/17 01:09 PM
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C_B5 Offline
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Related question - Are you planning to retain the pushbuttons to shift the trans ?

I would be interested in knowing what cable set-up you're using to connect the pushbutton to the trans.







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