Carpet installation - low tunnel vs high tunnel?

[MattTheCLGuy]

I was just looking through some of the carpet manufacturer's websites, and half of them have a specification in their molded carpets for either "C-6 transmission low tunnel" or "C-6 transmission high tunnel" for our pickups. Can someone tell me how to tell the difference on a '79 F250? Thanks!!

[whd507]

if you have a black bolt-on cover, its the high-hump. if you have no bolt-on cover, and only uncut sheetmetal, its low-hump.

[whd507]

under the carpet and padding of course.

[MattTheCLGuy]

Thanks man!!