I have seen plenty of heeaders on e-bodys with PS so they do make a set. yes I would see if you could swap them for a correct e-body pair with PS

i know I have had to ding/hammer a few sets on A-bodys with power which is way tighter than an e-body engine bay.

you may re-coop more of the $ back just listing them here on moparts in the for sale section listed as new/un-used for e-body.

maybe better than taking a hit for restocking/shipping.