hahaha the "shaker scoop" on the XY GT was stolen from the Mach1, guys. It's all available off the shelf here. You can either pay a few hundred for the fibreglass replica or $1500 for concourse aluminium assembly.
Having said all that, that IS an XY engine bay and you can see the black stripes on the plenum below the windscreen. The hinges, fan shroud and codes from the stickers (as accurate as THAT is....) suggests it's a 1970 XY, 351 Cleveland 4V