Mounting the shoulder belts depends on your car. Some cars have a frame member running behind your shoulders to mount the harness to. Just make sure you engage the threads through a bolt. Don't just tap the sheetmetal (you'll only have 1/8" for threads).
When in doubt go to the rollbar, it's not that high. Cost around $175??
The rollbar mounts are sold by:
Enzo at
www.cobraaccessories.com
and
SNAKEPIT AUTOMOTIVE Inc
233 Buffalo Avenue
Freeport, NY 11520
Tel: (516) 379-1300 x1041 Fax: (516) 378-2844
E-mail:
snakepitauto@aol.com
and
Shelby American
6755 Speedway Blvd.
Las Vegas NV 89115
(702) 643-3000
Stephen
Cobra University