Cinder blocks will break under a car or truck! I tried it 20 years ago and I don't think they're any stronger now. Always use jackstands(as many as possible) and even leave the floor jack under the jacking point when possible as extra backup. A pit is not a good idea and I doubt it will be legal in NJ anyway.
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69 Z28 JL8 4 wheel disc brakes - being restored
09 Silverado Z71
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