I just got my diff. back from being rebuilt, went from open diff. to a locker and from 3.31 ring to 3.90. My new problem is I was trying to put my new no-hop bars on and all I can say is there is not a chance in hell they are going to work. I know they are the right one but now think maybe I do not have the right diff. I pulled some numbers of of it in case someone can decode it for me nobody in Arizona is helping. On the axle tube I found the number CY10006B and on the pumpkin webbing I found GM4 F 21 70

and also NF
X 3917124
I would really be grateful for any help.

Thanx

The No-Hop bars are fairly universal, and fit just about any coil spring rear, whether it's a 10 bolt or 12 bolt from a Vega, Chevelle, Impala, or whatever.

Why do you say they don't fit?

CY10006B- Probably is CY1006B
CY = 67 or 68- 3.07, non-posi
1006 = Oct., 6th build date
B = Buffalo assy plant

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Steve Strasemeier (70SS 396, Fathom Blue/White Stripes)

CY= should be a '68 3:07 rearend.
Keep trying with the no hop bars they will fit. Follow manufactures directions.
-----------
Brett
'67
SS396
clone

You will probably need to do some grinding on them. Perhaps on the rear end case, also.

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Pat Kelley
66 El Camino, daily driver
67 El Camino, STRIP/street
Pat's Page (CR Calculator, Utilites, car specs) (http://cochise.uia.net/pkelley/)