i have an 02 chevy silverado ext cab and i wanna take out the bench in the back and put to regular seats like the ones i have now in the front i know it will take some modification but what exactly do i have to do to make them work or will they even work or should i just go with custom seats all the front and rear?

these are the kind of seats i want to put in the rear

 

I dont see why they wont work. You may have to make brackets but anything is possible. If they wont work, you can always send them my way.

 

first tool you will need is a tape measure. Measure the height and length (front to back) of the bench and both of those seats. that should tell you if it's gonna work.