Hey guys,  this is my first post, after lots of tries thru other resources.  I have my grand parents former car, my grandma's driver, a 1977 Catalina in great shape, with some Wisconsin disease underneath unfortunately.  The left front inner fender is rusted thru in too many places to save. I've been looking for one for awhile and gave up. If anyone has any info on if other B body GM are the same or not, I'd appreciate the help. Or if anyone knows of someone that might have one.  Thanks everyone:)

Nice Catalina! Don’t have an answer for you about the body but someone will be along who can. 

Thank you 😊  grandma drove the ladies to coffee many times in this car, grandpa always had the new pontiac wagons