There are no aluminum bolts used in any American made engine, but especially none with a cast iron block, like the 5,7L Hemi. The sump is likely in the rear and the oil pump is driven directly from the nose of the crankshaft. The pump is also totally enclosed so hoe could the timing chain scuff the gerotor pump? I think you are getting hosed by this guy. You don't want him pulling the pan because the gasket is also a windage tray and I suspect that alone is going to cost you a bunch. The oil pump pickup runs the full length of the pan, from the sump to the oil pump at the front.
Here is a picture of the engine. Notice the location of the oil pump. Sorry there isn't a better picture of the timing chain. What makes you believe thee is something wrong with the timing? Require that they return all the pieces that are replaced. None of this stuff is returned for a deposit.
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