12 bolt rearend

A

Anonymous

Guest
my friend has a 78 bu ....we are trying to fiqure out what size and offset we need to fit in his car..............we have a A body 12 bolt rearend in the car .....and we are looking to do some type of drag radial probally a 275 -60-15 what size rim and b.s. do we need ....thanks in advance ....TIM
 

lester622

Dragway Regular
Sep 5, 2006
1,209
0
0
new orleans
there 2 different lenght 12 bolts, there the earlier which is shorter then there the 68-7? that is longer.

the longer one u need atleast a 5.5 backspacing wheel with a 15x8 i was told but i have 15x10 and i need a 6" backspacing wheel with maybe a .25" spacer to fit a 28x11.50x15 hoosier quick time
 
A

Anonymous

Guest
I have a 1972 12 bolt 8 inch rim 5,5 Back spacing and 275/60 Drag radial rolled lip notch frame. Fits nice.
 
A

Anonymous

Guest
ok

borrow a wheel and trial fit....
i have a 71 12 bolt. 5" b/s iroc rear wheels are ALL the b/s it will take. otherwise it will put the wheel in the shock mount. this is with the SSM 1328 kit too. got the wheels for free, and the 26-11.50s look EVIL in there!!!!
 

slimbo

Moderator
May 21, 2007
4,223
0
0
www.yellowbullet.com
an 8 inch 5.5 backspace rim fits on mine but the lower shock mount requires massaging. it requires some work anyway to make the shock line up correctly.
 

MalibuRacing.com Gear

Stickers & Shirts!!

Latest posts