Sold new at Quality Chevrolet in Oak Lawn, IL. Looks like it was Cortez Silver originally. Trans is a replacement but it's supposed to come with the original VIN-stamped CRV block (engine in the car is a replacement).
Definitely has that driver look with the speakers cut into the door panels, but if you could buy this one at a fair price, and reinstall the original engine, you may have some room to work with....
Link to 1970 LS6 Chevelle