Hi!
I built and flew a similar Cessna 310 (Marutaka) 40 years ago that was powered by two ENYA .40X engines and it flew way way too fast.
Soo if you want to have a nice flying model build it light. That means choosing the lightest engines you can get your hands on ( OS FP .40 ) and carving a away every unnecessary piece of wood you can find.
No way I would use those heavy gassers pictured!