i have a front sump road race pan, i think it is moroso, but not the extra long pan that original cobras used (with full length sump I think). The rear half of my pan is shallow. There was no problem removing this around the cross member,
accessing the
oil pan bolts should be do-able for any pan - the front ones are tricky due to the wide sump, but not a big challenge.
i cant speak for the full length pans that might be deeper in the rear?
but assuming the pan can come off, the rear seal is much easier to do in the car than removing engine.