Spare tire well

Huh. The AMD panel is only $296 from summit here, but it needs truck freight so that isn't cheap. The Sherman panel is $100 here though, not sure what that means it will cost there.

If you're doing the welding yourself it isn't an issue, but if you're paying someone to weld it in the time required to weld the sherman panel in might end up costing just as much as the difference between the panels. Butt-welding sheetmetal isn't a lot of fun, and spot welding the whole panel in would be significantly faster. So it really comes down to labor/time. I do my own welding, so my labor/time is "free", but if you're paying someone you may want to talk to them first.