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Re: Disc Brake Upgrade Reference Thread
I don't remember for sure on a '70 C30 if the lower control arm shafts are round or flat like the '63-'66's. If they are round there is no reason you can't swap everything from the '81 including the control arms. I would suggest going with the lower control arm shaft U-bolts from the '81. I believe they are a little bigger than the '70 pieces.
If the LCA shafts on the '70 are flat, you'll have to either keep the '70 LCA's or swap the entire crossmember
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