overall a nice job, but I think that the angle on the B pillar is too abrupt and should have more slope on it
https://www.youtube.com/watch?v=dmcPQyP-01g (https://www.youtube.com/watch?v=dmcPQyP-01g)
this Valiant conversion is a better approach to the back window and sail panels
(https://d3lp4xedbqa8a5.cloudfront.net/s3/digital-cougar-assets/streetmachine/2017/10/30/Misc/chrysler-cl-valiant-ute-rear.jpg)