I know it is possible but what has to be altered to make it tilt forward for rear seat access? I have a decent 4 door bench core that I figured I would use instead of pay big bucks for a set of buckets.
The back of a hindged seat is slightly wider than the base and has hindge arms attached to pivot pins on the base. The fixed seat in a 4 door is made a lot different. Cutting and welding would be required to make a fixed seat hindged.
i do know that you can get buckets out of a 76 SE 4dr dart or val and make them work for a 2dr,take out a pin and they tilt forward,never tried a bench seat
If you seat is like this one all you have to do is remove this peice (the screwdriver pointing to). Its held on by a small allen screw and a snap ring. The only drawback is there is nothing to lock the seat in its upright position.
A Full Bench (Single Piece Back) cannot be converted. The Split Benches can. As was said above.... You need to find a Latch Assembly to bolt onto the Backs after you remove the Lock Bars. Not having the Latchs can kill you in an accident!