today i bought a 355 4 bolt main. the engine has 305 rebuild heads on it, has been bored .30 over and has 10,000 miles since the rebuild. right now it is carbed but I plan on using the tpi from my 86 305HO. I plan on porting the intake manifold and using a hydraulic roller cam. I don't know like anything about matching heads for airflow, clearance and what not. I also dont know what cam to use. i plan on making like 300hp. i have no clue how to match everything up so their is no bottle necks or going overboard on some items that wont ever use their maximum potential. If anyone has any advice feel free to let me know. thanks