Cab mounts question

[66 Stepside C X]

Originally Posted by LostMy65

Personally, I'd drill a small hole up from the bottom as close to the actual hole as possible, then you will know where the hole should be on top.
Then, you will need the recessed washer for the bolt hole in the floor.
.
Check out this post:
http://67-72chevytrucks.com/vboard/s...81#post7454881
.

How would you recommend removing the existing bolt without losing it inside the overlaying panel? Since I would have to do that before I can drill form the bottom
Correct ?