I have a 87 iroc an need linkage for the carb. for a 750 Demon an can I use the stock cables or are they to long? some part no. would be great Thanks.

 

As far as throttle brackets basically any one will work for the throttle, but not with the trans tv cable.
2 that will work are:
holley 20-95
Professional Products 52126

Either one will work it's up to you

Also it's very important to get the angle corrector so the tv cable is in the correct position compared to the throttle for correct line pressure.

Holley 20-121

 

If your car was a TPI car you might have a problem with the throttle cable binding up. I haven't done this mod but I have seen on another thread where someone did this swap and they are having some issues with their throttle cable being tight because of the bends.

I would first put your stock throttle cable into the throttle bracket and then check and see if the cable moves freely. If it doesn't move freely then the easiest thing to do in this case is just get a throttle cable from a stock carb'd 3rd gen. You might be able to get one from a local scrap (bone, junk, used parts) yard or check with Hawks Third Gen. They are not that hard to remove or replace.