Measurements are a bit hard to explain without a drawn diagram with reference points. Suggest you pick up a 1966 Chevelle Factory Assembly Instruction Manual from any number of suppliers on eBay. Page 11-13/B9 has the 0-line references and pages 11-13/B3 and L35/A10 has the measurements, my CD on 66 Chevelles, or any other various publications. :thumbsup:
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