4.0 to 4.5

[mike-v2tmf]

What engine internals do I need to change to go from 4.0 to 4.5 please RR V8

[mike-v2tmf]

Does anyone know what needs changing to take a 4.0 RR engine to 4.5 please .........ie crank , rods pistone ? are the bores the same diameter etc ?

[mike-v2tmf]

Thank you

[mike-v2tmf]

Its a true x bolted serp engine