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  • 1965 - 1973 Classic Mustangs -General/Talk-

66 rear end in a 68?

  • Thread starter Thread starter Gkirch
  • Start date Start date Dec 13, 2020
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Gkirch

Member
Dec 13, 2020
5
1
13
Abilene, Tx
Dec 13, 2020
#1
  • Dec 13, 2020
  • #1
I’ve got a 68 car that has the 4 lug rear end. I’ve also got a 66 8” 5 lug that I plan on swapping onto the 68. Other than being 2” shorter in width, will I run into any issues with this swap?
 

wicked93gs

15 Year Member
Sep 30, 2006
1,198
228
93
Nashville TN
Dec 13, 2020
#2
  • Dec 13, 2020
  • #2
Yes, the axle tubes on the 65-66 taper where the mounting plates go, 67+ do not, so you will need 65-66 specific u-bolts and shock plates....alternatively you can slot the holes on the 67-68 plates...but you will still need smaller u-bolts.
 
G

Gkirch

Member
Dec 13, 2020
5
1
13
Abilene, Tx
Dec 13, 2020
#3
  • Dec 13, 2020
  • #3
wicked93gs said:
Yes, the axle tubes on the 65-66 taper where the mounting plates go, 67+ do not, so you will need 65-66 specific u-bolts and shock plates....alternatively you can slot the holes on the 67-68 plates...but you will still need smaller u-bolts.
Click to expand...
Awesome, thanks! It’s mounted on a set of old springs, so the hardware is all there except for the brake assy. Thanks for the reply
 

wicked93gs

15 Year Member
Sep 30, 2006
1,198
228
93
Nashville TN
Dec 13, 2020
#4
  • Dec 13, 2020
  • #4
Heh, I ran into that when I went the other way and installed a '67 8" in my '66...needless to say getting the correct hardware set me back by almost 2 weeks....it just so happens the extra width helped me to be able to run my '05 v6 wheels....still ended up with spacer/adapters, but was a lot closer than the narrower rear end.
 
G

Gkirch

Member
Dec 13, 2020
5
1
13
Abilene, Tx
Dec 13, 2020
#5
  • Dec 13, 2020
  • #5
wicked93gs said:
Heh, I ran into that when I went the other way and installed a '67 8" in my '66...needless to say getting the correct hardware set me back by almost 2 weeks....it just so happens the extra width helped me to be able to run my '05 v6 wheels....still ended up with spacer/adapters, but was a lot closer than the narrower rear end.
Click to expand...
That’s the whole reason I’m doing the swap, to be able to run the wheels I want (17x7, 4.5 backspace) With adapters, they are about an inch out of the wheel well, so I can deal with spacers
 

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