can I run old A7 physics inside A8?

I would like to use the power A8 in my project to resource and Render my project.
(was created with Lite-c and old A7physics engine.)

can I copy the physics dlls from A7 and put it inside A8 root?
and or is there spec way to handle old physics projects.

I do realize new physics is better, but the old project is already completed and I need to put together a demo for client.

thank you guys in advance for imput