I will take a stab at it. 650 hp at 6500 rpm. For sure it will be a fun ride. The cam you chose should give you excellent service life, making for many good years full of fun. Once built, fine tuning is all that should be done IMHO. Maybe a manifold, carb or header change, but i see this build as an excellent long term performer. The 440 i built in 1975 lasted till 2018, but was still running last i heard!