Lamborghini Miura manual indicating bigger intake valves in English size (but correct size in metric). The intake and exhaust valves in all 4 liter Lamborghini V12 remained the same throughout all models. This intake size misprint carried forward into Espada 400GT and Countach LP 400/LP 400S owners manuals as well. In 1970, Lamborghini development driver Bob Wallace created a test mule that would conform to the FIA's Appendix J racing regulations. The car was appropriately named the Miura Jota (the pronunciation of the letter 'J' in Spanish). Wallace made extensive modifications to the standard Miura chassis and engine. Weight reductions included replacing
Lincoln-Zephyr V12 engine for 1942. Yet this V-12 never shed its reputation for service troubles, though the postwar versions were actually quite reliable. The V12 was eventually replaced by the InVincible 8, simply a version of the flathead V8 found on Ford's truck line. The Zephyr V12 was also used by Allard, Atalanta, and Brough Superior in England. Allard made three V12 cars, using the Ford V8 for all other cars at that time, Brough also made only one V12 as his others were Hudson 6 or 8 powered, and Jensen made one called the HL. The first Lincoln-Zephyr models of 1936 used