Re: C30 onto C20 suspension swap.
The front will be just like swapping the suspension on a C10.....2 holes to drill and 2 holes to elongate. As for the rear, are you wanting to change to leaf springs or keep the trailing arms? If that rear differential is a Dana 70 as I mentioned in your other thread, it will not bolt up to the trailing arms. A '73+ 14 bolt will bolt up just barely. Some guys grind a little groove in the axle tubes to facilitate u-bolt installation.
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