I purchased a sparco harness bar and installation appears easy enough however after removing seat belt assembly found the 9mm bolt to be too short to catch with the sparco harness attachement. I want to keep the seat belt straps in and use the harness bar for the track only. Cannnot find longer 9mm bolts. Has anyone encountered this problem and how have you handled this? If you didn't utilize the exsiting seat belt were you able to use the 9mm bolt with the harness bar attachment and did you need to put in spacers?