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Leaf springs U-Bolt recommendations
#11
(02-13-2019, 06:51 PM)EBSTANG Wrote: Tony, I researched this ad nauseam back when I rebuilt my car in 2015. These were the u-bolts I ended up with. This supplier knows their sh*t when it comes to axles and hardware.

https://www.stengelbros.net/361-425-Roun...p_360.html

Thanks. The u-bolts in your link are 3.0625" ID. Mine are 2 7/8", which is the diameter of the axle.

        [Image: 20160929_171923_edit2_small.jpg]

1971 M-Code Mach 1 w/Ram Air, 408 stroker, 285/291 0.558" roller cam, Blue Thunder intake, TKO600, Hooker headers with electric cut-offs, FiTech EFI w/ RobBMC PowerSurge pump
4-wheel disc brakes
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#12
(02-13-2019, 01:01 PM)c9zx Wrote: I would use the Regular U bolts if possible. I have yet to find a replacement U bolt that has a flattened inner radius (OEM) to better grip the axle tube. I would suggest "boxing in" the spring perches to keep them from bending on hard launches. If they bend and pop off the locating pin in the spring VERY bad things can happen, been there done that, a LONG time ago. Chuck

https://www.currieenterprises.com/CE-7000BX

Chuck ... like these

http://www.ohiomustang.com/store/order_p...temid=3318

Ohio Mustang Supply
440-949-2556

[Image: oms_sig_banner.jpg]
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#13
(02-14-2019, 11:10 AM)OMS Wrote:
(02-13-2019, 01:01 PM)c9zx Wrote: I would use the Regular U bolts if possible. I have yet to find a replacement U bolt that has a flattened inner radius (OEM) to better grip the axle tube. I would suggest "boxing in" the spring perches to keep them from bending on hard launches. If they bend and pop off the locating pin in the spring VERY bad things can happen, been there done that, a LONG time ago. Chuck

https://www.currieenterprises.com/CE-7000BX

Chuck ... like these

http://www.ohiomustang.com/store/order_p...temid=3318

Don, I said "I have yet to find", now, thanks to you, "I have found". Tongue Good to know that they are now available from our favorite wise guy. Chuck
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#14
(02-14-2019, 11:10 AM)OMS Wrote:
(02-13-2019, 01:01 PM)c9zx Wrote: I would use the Regular U bolts if possible. I have yet to find a replacement U bolt that has a flattened inner radius (OEM) to better grip the axle tube. I would suggest "boxing in" the spring perches to keep them from bending on hard launches. If they bend and pop off the locating pin in the spring VERY bad things can happen, been there done that, a LONG time ago. Chuck

https://www.currieenterprises.com/CE-7000BX

Chuck ... like these

http://www.ohiomustang.com/store/order_p...temid=3318

Don, what are the 3 dimensions on those U-bolts? (Diameter (A) x Distance Between Legs (B) x Leg Length ©)

Don't be afraid to try something new. Remember, amateurs built the Ark...Professionals built the Titanic! thumb

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#15
(02-14-2019, 04:54 PM)EBSTANG Wrote:
(02-14-2019, 11:10 AM)OMS Wrote:
(02-13-2019, 01:01 PM)c9zx Wrote: I would use the Regular U bolts if possible. I have yet to find a replacement U bolt that has a flattened inner radius (OEM) to better grip the axle tube. I would suggest "boxing in" the spring perches to keep them from bending on hard launches. If they bend and pop off the locating pin in the spring VERY bad things can happen, been there done that, a LONG time ago. Chuck

https://www.currieenterprises.com/CE-7000BX

Chuck ... like these

http://www.ohiomustang.com/store/order_p...temid=3318

Don, what are the 3 dimensions on those U-bolts?  (Diameter (A) x Distance Between Legs (B) x Leg Length ©)
AMK lists  B @ 3.20 and C @ 5.75
There are 71 - 3 Mustang specific ... 67 - 70 are shorter
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#16
(02-15-2019, 08:55 AM)OMS Wrote:
(02-14-2019, 04:54 PM)EBSTANG Wrote:
(02-14-2019, 11:10 AM)OMS Wrote: Chuck ... like these

http://www.ohiomustang.com/store/order_p...temid=3318

Don, what are the 3 dimensions on those U-bolts?  (Diameter (A) x Distance Between Legs (B) x Leg Length ©)
AMK lists  B @ 3.20 and C @ 5.75
There are 71 - 3 Mustang specific ... 67 - 70 are shorter
Thank you Don for the information. I need to measure my new springs. They are Maier's 4.5 leaf which are thicker than stock, plus I am using a 2 degree shim (edit: it is 4 degrees). With that said, I think these U-bolts may be too short.

        [Image: 20160929_171923_edit2_small.jpg]

1971 M-Code Mach 1 w/Ram Air, 408 stroker, 285/291 0.558" roller cam, Blue Thunder intake, TKO600, Hooker headers with electric cut-offs, FiTech EFI w/ RobBMC PowerSurge pump
4-wheel disc brakes
  Reply
#17
(02-15-2019, 08:55 AM)OMS Wrote:
(02-14-2019, 04:54 PM)EBSTANG Wrote:
(02-14-2019, 11:10 AM)OMS Wrote: Chuck ... like these

http://www.ohiomustang.com/store/order_p...temid=3318

Don, what are the 3 dimensions on those U-bolts?  (Diameter (A) x Distance Between Legs (B) x Leg Length ©)
AMK lists  B @ 3.20 and C @ 5.75
There are 71 - 3 Mustang specific ... 67 - 70 are shorter

Thanks for the answers...is the bolt diameter 7/16"-20 or 1/2"-20?...asking for a friend

Don't be afraid to try something new. Remember, amateurs built the Ark...Professionals built the Titanic! thumb

  Reply
#18
Thank you everyone. I like the fact that Don's U-bols have the flattened top, but after measuring they will be a bit short since I am replacing the OEM springs with 4.5 leaf springs plus the angle shim. I ended up purchasing Dayton's 361-450 U-bolt kit. They are Grade 5 with 1/2 bolts. I will have to drill the plates to fit these but that shouldn't be a big deal.

        [Image: 20160929_171923_edit2_small.jpg]

1971 M-Code Mach 1 w/Ram Air, 408 stroker, 285/291 0.558" roller cam, Blue Thunder intake, TKO600, Hooker headers with electric cut-offs, FiTech EFI w/ RobBMC PowerSurge pump
4-wheel disc brakes
  Reply
#19
(02-15-2019, 04:14 PM)EBSTANG Wrote:
(02-15-2019, 08:55 AM)OMS Wrote:
(02-14-2019, 04:54 PM)EBSTANG Wrote: Don, what are the 3 dimensions on those U-bolts?  (Diameter (A) x Distance Between Legs (B) x Leg Length ©)
AMK lists  B @ 3.20 and C @ 5.75
There are 71 - 3 Mustang specific ... 67 - 70 are shorter

Thanks for the answers...is the bolt diameter 7/16"-20 or 1/2"-20?...asking for a friend

So I'll guess they're 7/16"-20 since Don doesn't know...

Don't be afraid to try something new. Remember, amateurs built the Ark...Professionals built the Titanic! thumb

  Reply
#20
(02-18-2019, 02:41 PM)EBSTANG Wrote:
(02-15-2019, 04:14 PM)EBSTANG Wrote:
(02-15-2019, 08:55 AM)OMS Wrote: AMK lists  B @ 3.20 and C @ 5.75
There are 71 - 3 Mustang specific ... 67 - 70 are shorter

Thanks for the answers...is the bolt diameter 7/16"-20 or 1/2"-20?...asking for a friend

So I'll guess they're 7/16"-20 since Don doesn't know...

Yes, my OEM ones are 7/16".

        [Image: 20160929_171923_edit2_small.jpg]

1971 M-Code Mach 1 w/Ram Air, 408 stroker, 285/291 0.558" roller cam, Blue Thunder intake, TKO600, Hooker headers with electric cut-offs, FiTech EFI w/ RobBMC PowerSurge pump
4-wheel disc brakes
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