Problem is i have an '79 MC. I have given up to find some doors in Europe, there just not around.!You need 78' - 80' doors only to be a direct fit and have the body lines line up.
They sell new lower inner and outer door patches to repair the common issue of door bottoms rotting out but are only for the 81'-88' doors but you might be able to modify them to fit your earlier door.
Maybe some pics to see what your working with?
GBodyForum is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to amazon.com. Amazon, the Amazon logo, AmazonSupply, and the AmazonSupply logo are trademarks of Amazon.com, Inc. or its affiliates.