is my engine builder on drugs?

[Fat0eknee]

he said he would find the cam to best suit my needs
the heads are untouched straight out of the box TFS twisted wedge heads

this is exactly what he said - "these heads on a 347 you will see all of 350 horsepower" he also said he forgot the dyno numbers from the last 347 he did but that was his guess ...im not sure if he was talkin about at the wheels or flywheel hp

what i was thinkin was to make about 400 with that setup ..anybody have a cam suggestion
ive messed up enough as it is and i want to do my motor right this time around

ive yet to order the rest of my parts - the only thing im certain on is that i have the TFS heads and he is building the 347 up for me
i can still make changes to my intake/cam/carb selection at this point