REAR Bonnie Seat Install:First off need to give credit where credit is due....I could not have done this without the help of a very knowledgeable member of my local Impala SS Club (Thanks Paul !!!) We started by taking out the Bottom & Back of the SS rear seat:the Bottom comes out by smacking with your fist the part your calf would rest against if sitting in the car. Doing so on both sides releases the frame(last pic on page #7) from the hooks in the floor board.Next is the SS seat back starting with removing the bolts holding the shoulder belts in:there are 2 one for each sideWith bolts removed we pushed up on seat back to release it from the hooks in the car.Now with the SS seats out Paul did a lot of measure twice, cut once and weld once....He started with the Bonnie Seat BackThe SS seat hooks are closer together than the Bonnie seat back frame was designed for. So he used the seat bracket to weld on a new frame that would align with the SS seat hooks in the car.Next PAUL fabs a bracket to be welded onto the frame so the seat can attach to hooks in the car, also notice in fourth pic he cut the top hook and welded the new frame to it for more support.The last modification of the Bonnie seat back was to straighten the hooks at bottom of the seat.pic to left shows hooks before bendingNow for the rear Bonnie bottom seat. Luckily all that was needed was to remove some of the seat foam to expose MORE of the metal frame, to align with the hooks in the car floor board.Now that the modifications are done we just bolted the seat back in, remembering to attach the seat belts. This was done a couple times to get the Bonnies to sit low enough, and not protrude too high at the rear deck where the rear speakers are. Here's how it came out.