The cars are pretty much identical. Any mechanical bit should be more or less interchangeable. The del slo brakes will swap over, as will the engine/trans. If your sol is manual, you'll also have all the parts you need to do the auto/manual conversion.

So, if you're married to the hatchback, you should have everything you need. Or you could just fix the del slo, junk the hatch, and call it a day. :shrug: