Some 51 years later, Jaguar is finally set to finish what it started. Back in 1963, the esteemed British automakerreleased a limited-run Lightweight E-Type, originally planned to feature18 units but ultimately yielding only 12. Jaguar, under its Special Operations division, is now completing the initial task, with the final six cars to be produced showcasing abalance of historic accuracy and new technology. Until then, the prototype has been unveiled, built withanaluminum body that sheds 250 lbs versus the production steel bodywork. Underneath the hood is a 3,868cc straight-six with a big valve "wide angle" cylinder head and pressed-in steel liners, dry-sump lubrication, three 45DCO3 Weber carburetors and an aluminum block instead of the original car's cast iron build. The resulting300 horsepower and 280 pound-feet of torque are channeled through a four-speed manual gearbox, which is fully synchronized with a single-plate clutch, lightweight flywheel and Powr-Lok limited slip differential. The prototype debuts this weekend at Pebble Beach.