A/C brackets what works with what years/vehicles

This can be a real nightmare mixing and matching parts. The are many variations. I would find the parts specific to your vehicle.

Does the car have the same type motor that was originally in it? That will also be a complication.
Yes. We'll sort of. It currently has a 318 it originally came with a 360. I have a roller 360 block I'll be putting in it.