I had an earlier question about using the high back seat with a 5 point harness. I guess it won't work out. So my next question is: would it work to cut a slit in the seat back to pass the belts through at shoulder level? I already have a 6 point bar installed. I could get different seats with a lower back (maybe Fox body Mustang LX seats or?-don't need anything fancy since it will be a limited street use car) but wouldn't know what to do with the Mach 1 seats. Can't believe how one thing seems to always lead to another.