XC2766X VS C167CR-LM: what implications on my FW

Hello,
I've to evaluate if it's easy to mantain my fw (developed with microvision 2) changing the boards architecture with a new controller Infineon XC2766X in place of the old C167CR-LM.

In my fw I access the port, internal and external memory, the CAN bus and the external bus using chip select addresses.

Do you know if are there any difficulties in the firmware when changing controller?
Is it available any manual or user guide to move the firmware to the new architecture?

Thanks