Hennessey on Wednesday said it has signed off on technical development of its Venom F5, with the final round of tests seeing the homegrown hypercar hit a top speed of 271.6 at NASA’s runway in Florida. That’s close to the current land speed record of 282.9 mph, set by the SSC Tuatara in 2021, but Hennessey’s ultimate goal is to reach 311 mph, or…