Your opinion on this combo

Sorry i should have written what i have and what is planned to be changed regarding the engine!

The heads are already ported and converted to open chamber by the previous owner ( why they were converted i dont know i think he dindnt want more compression than 9.5:1 :? )

But the pistons , rods , 4 bolt mains , camshaft and the mighty demon is planned.
Sorry for the confusion :)