As far as I'm aware, the only part of the inner panel that you'll remove is the back panel at the bottom which, I believe, covers the actual motor etc. From memory of dealing with ours, you should be able to reach anything you'll need to, with some dexterity, from that aperture.
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Stephen J Irons
Corvette Club France
CCCUK Lifetime Member
Corvettes of Southern California
NCM Family Member
Red Corvettes Have More Fun!