which one

I guessing good heads but not cheap heads. they always told me horsepower costs. Well only plan on going around once. SO oil thru push rods 5.140 long valves 640 plus lift cam . heavy springs offset rockers tti big buck headers. What am I missing? Besides a second job to pay for all this. oh yeah almost forgot heads need to be worked and a W2 intake. What am I missing ? Was just told nobody has stock valves for these heads. maybe also part time job