Yep. Holman-Moody prepped. Wild Bill Shrewsberry drove this version of the Batmobile for exhibition. He said he could launch in 2nd gear and smoke the tires the full 1/4.
Nope, the 460 hadn't even been produced yet when that Bat ran. Take a closer look at the engine, definitely an FE engine, you can see the exhaust port shape and the typical Ford 2x4 manifold with the backwards mounted Holleys, 427 like the Doc said.