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Are you Joseph Potak, author of the books below?
How to Build and Modify GM LS-Series Engines by Joseph Potak GM LS-Series Engines by Joseph Potak How to Build and Modify GM LS-Series Engines by Joseph Potak GM LS-Series Engines by Joseph Potak How to Build and Modify GM Ls-Series Engines by Joseph Potak 1993-2002 Camaro and Firebird Performance Handbook by Joseph Potak GM LS-Series Engines by Joseph Potak LS Engine Parts Interchange by Joseph Potak LS Engine Parts Interchange by Joseph Potak


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