There are some studs riveted to the toeboard up near the vertical part of the firewall, that the floor mats slip over. They have a ridge at the top to keep the mat on.

Pic of the passenger side ones.

On edit, this is on an AD. I assume the TaskForce trucks are similar.
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Last edited by klhansen; 04/12/2020 2:55 AM.

Kevin
1951 Chevy 3100 work truck
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1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.