[Retrohowla]

Hi guys, I've got a strange rattle coming from what sounds like deep in the centre of the dashboard, it's obvious at 10mph/1200rpm, and again at about 2500rpm. (It's an auto)
It seems revs/engine related but you can't really hear it outside the vehicle.
I'm now paranoid it's the engine, I've changed the vac pump for new and it made no difference.
I've a video of the symptoms but I'm unsure how to post it up?