I debated whether to post this - mainly because I don't want you to think I'm being a smart ass. So, if you know all the stuff below, I apologize:
now i notice theres like a bracket like thing can i take that and get it re tapped and threaded?
If you mean these things:
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they're called body mount brackets.
I don't mean to put words in your mouth, but it would appear - from your statement above - that you are under the impression that the mounting bolt is somehow threaded into the bracket. It doesn't thread into the bracket, it just passes through it.
The bolts are 3 1/2" long. The bolt first passes through the center bore of the lower bushing, the eye of the support bracket and the center bore of the upper bushing. Next it passes through a penetration in the lower flange of the "cab floor support channel". Finally it passes through another penetration in the bottom of the "cab floor support" - at the most inboard end.
The cab floor support runs cross-wise - under the cab floor - from the cab floor support channel (which runs longitudinally - front to back) all the way out to the inboard face of the inner rocker panel. It is basically a deep, thin channel made of sheet steel - with the open side facing up and welded to the underside of the cab floor.
Some images to help explain - courtesy of Chuck:
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Hidden inside the cab floor support void space - at the inboard end (directly above where the mount bolt, upper mount bushing and cab floor support channel are all stacked) - is a square shaped piece of steel with a threaded hole in the middle. The threaded hole is there to accept the mount bushing bolt. The sides of this square "nut" are the same length as the distance across the inside wall of the cab floor support. The nut is considered to be part of the floor support and is unserviceable. After the floor support is welded to the underside of the cab floor at the assembly plant, it is sealed within that void space forever.
Before the cab mount bolt is threaded into it, the nut is essentially free to move (i.e. it is not welded in place) within the floor support. The only thing that holds it from spinning - when the mount bolt is being threaded into it - is it's tight fit to the floor support's inner walls.
It is not accessible from
anywhere - unless an access point is created. This can be done by making a hole from inside the cab - through the floor (where it is visible by looking down) or from under the cab - through the side wall of the cab floor support.
Since your factory "nuts" have the sheared off tips of the mount bolts in them, they are currently useless. So, as I'm sure you can see, one way or another they will need to be accessed - either for repair or replacement - before the new mount bolts can be installed.
One bit of good news; after you create the access hole - either through the side of the support or down through the cab floor - you will have some latitude as far as what the bolt can be screwed into. Because there will then be an opening, you won't have to try and find new square OEM style "nuts" - or extract the sheared bolts and retap the originals. You will be able to drop in - or slide in from the side - plain old, off the shelf 1/2" X 13 NC nuts with a washer under them. When you go to screw the new bolts in the access holes will allow you to hold the nuts with a socket (floor) or a wrench (side of support).
When the bolts are brought up tight, close the access holes using an appropriate method - like seal welding a doubler plate or a rubber body plug for instance. That's what Art & J-m were talking about when they offered suggestions on resealing the holes.
Some real life images:
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