Does anyone know of a toolbox that can be mounted in the bed of a 5th Generation El Camino?

Thanks.

I mounted a flat bottom universal truck tool box in the center next to the rear glass. It has served me well.

Did you drill into the spare tire storage compartment? If so what did you do to make sure it does not leak?

Thanks

Yes I did but I have a rubber bed mat that I screw though also. It seals it off.