What have you 289 guys done to mount the door striker? The body door opening is 2" away from the mount plate on the chassis due to cutback doors. The typical approach of bolting the striker only to the chassis isn't even close to working, stud is way too short.
It appears there is enough room to fab a bracket and weld to the chassis to allow the plate that comes with the striker to be bolted to.
I look forward to your experiences in resolving this detail.