In looking at your photos a little more, it appears that you may have aftermarket lowering spindles. The aftermarket spindles are one-piece with integral steering arms and caliper mounts, unlike the OEM spindles with bolt on steering arms and caliper mounts. The caliper looks like the generic single-piston GM caliper.
The other option is that this is a second gen 70-81 Camaro/75-79 Nova front end. Those used front steer and one-piece spindles. Unfortunately, the ball joints for those are different than on the earlier cars.