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#2399320 - 11/06/17 10:30 AM 5.7 and the 727 pb
csmopar Offline
member

Registered: 07/30/06
Posts: 177
Loc: usa
I've been trying to determine if a 5.7 hemi can mate to a small block 727 pushbutton. Has anyone tried this?

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#2399391 - 11/06/17 12:09 PM Re: 5.7 and the 727 pb [Re: csmopar]
hudsonhornet7x Offline
super stock

Registered: 01/14/12
Posts: 1048
Loc: Plumer, Pa
It will bolt right up. You just need the correct flex plate.
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#2399504 - 11/06/17 03:40 PM Re: 5.7 and the 727 pb [Re: hudsonhornet7x]
sam64 Offline
super stock

Registered: 12/19/08
Posts: 1180
Loc: okla.
if it is pre 1965 I think the bottom pass.bolt will not line up,other than that it will work.
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#2399513 - 11/06/17 03:57 PM Re: 5.7 and the 727 pb [Re: hudsonhornet7x]
csmopar Offline
member

Registered: 07/30/06
Posts: 177
Loc: usa
Originally Posted By hudsonhornet7x
It will bolt right up. You just need the correct flex plate.


Sweet thanks

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#2399514 - 11/06/17 03:57 PM Re: 5.7 and the 727 pb [Re: sam64]
csmopar Offline
member

Registered: 07/30/06
Posts: 177
Loc: usa
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

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#2399550 - 11/06/17 04:55 PM Re: 5.7 and the 727 pb [Re: csmopar]
moparpollack Offline
Lil Herman

Registered: 11/13/05
Posts: 14522
Loc: 85086
Are the bolts that go into the block metric?
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#2399624 - 11/06/17 07:01 PM Re: 5.7 and the 727 pb [Re: csmopar]
RTSE4ME Offline
top fuel

Registered: 01/20/03
Posts: 1602
Loc: MD
No, 3/8-16 thread I used the small block ARP bellhousing bolt kit

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#2399625 - 11/06/17 07:01 PM Re: 5.7 and the 727 pb [Re: csmopar]
savoy64 Offline
top fuel

Registered: 09/07/11
Posts: 1795
Loc: colorado
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....

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#2399645 - 11/06/17 07:20 PM Re: 5.7 and the 727 pb [Re: savoy64]
moparmitch Offline
member

Registered: 02/16/10
Posts: 121
Loc: Michigan
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?


Edited by moparmitch (11/06/17 07:44 PM)

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#2399654 - 11/06/17 07:33 PM Re: 5.7 and the 727 pb [Re: csmopar]
cudadoug Offline
master

Registered: 08/22/03
Posts: 3038
Loc: 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?

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#2399670 - 11/06/17 07:57 PM Re: 5.7 and the 727 pb [Re: cudadoug]
sam64 Offline
super stock

Registered: 12/19/08
Posts: 1180
Loc: okla.
some of the first flex plate conversions used a spacer between the block and trans.because the flex plate was flat.
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#2399901 - 11/07/17 09:24 AM Re: 5.7 and the 727 pb [Re: sam64]
csmopar Offline
member

Registered: 07/30/06
Posts: 177
Loc: usa
awesome thanks

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#2400154 - 11/07/17 05:51 PM Re: 5.7 and the 727 pb [Re: csmopar]
savoy64 Offline
top fuel

Registered: 09/07/11
Posts: 1795
Loc: colorado
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.


Edited by savoy64 (11/07/17 06:51 PM)

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#2402449 - 11/12/17 10:09 AM Re: 5.7 and the 727 pb [Re: csmopar]
C_B5 Offline
super stock

Registered: 01/22/04
Posts: 989
Loc: Ohio
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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