Several rebuilt and Dyno tested engines ready to run. 1 6v-71 and one 16v-71. Several other engines available not listed in inventory. All engines have rebuild receipt and test results. 6v-71 10k 16v-71 14k rebuilt by CM marine with factory Detroit parts, not aftermarket. email slegfishing@gmail.com for build receipts, specs and pictures. engines are located in Tampa, and ready for transport.