Any in.true hot-rodderin. who has access to an IBM-compatible computer will love this engine simulation package. Run your engine specs (up to 1,000 cu.in.) on the software to verify and maximize performance gains. See on-screen which modifications will return the best rewards! Save time and money over actual changes.Version 2.0.7, for DOS or Windows. Accompanying book (soft- bound, 125 pages) provides instructions, background, and engine theory. By Larry Atherton