How to know what modifications have been done to 318?

The intake and carb may have been changed back to original. Thanks for the info! I will put a gauge on it, but I have had friends tell me that 318's just don't sound like that! It burns no oil and plugs look great! I rebuilt the 2 barrel recently because of poor quick throttle response at initial WOT and rough Idle! Found several vacuum leaks that were repaired. I've had a few muscle car owner that I know look at it and tell me there is a definitely a performance cam in it but to what degree? That explains the rough idle!

Still has a weak throttle response at the initial quick take off. If I get into it real quick, it wants to sputter, then stand back into it it is fine! I'm thinking that carb just can not respond quick enough. Replaced fuel pump and filter as well (fuel pump was weak)(problems with fuel not staying primed). Any other word, please respond!