Thsee parts are from a Riviera. They are going to be nearly useless on anything but Riviera unfortunately. It's missing a few components from the pictures that might just be out of shot like: ignition control computer, up/down pipes for the turbine.
Value of these would be best for someone with a turbo Riviera and honestly the turbo and perhaps the distributor are the only real wanted pieces here. $300 complete or around $200 for distributor and turbo.
The intake and exhaust manifolds only work in a FWD type engine setup, it hangs the turbo off the rear of the engine above the trans bell housing instead of how the Regal has the turbo on top of the intake manifold.