Will this Work( Header Question)

Pretty much. The mounting to the block wouldn't be the problem, it's clearance or interference with anything else in your bay. Relocated PS pump, etc, etc, anything weird they might have done, you know. So, if your /6 bay is pretty sparse, and the charger has a pretty sparse bay, I'd just do some basic angles and measurements, then run the angles and measurements on the charger. If they're close enough, you might have to wiggle them a bit, but it shouldn't pose too many issues.

You're still looking at an e/b to a swap, so.. just be on the lookout for complications.