340Help!!

Hi guys I need some help/recommendations. I recently was told by a local MOPAR guy I wiped a lobe off my cam although I haven’t pulled it to confirm. I built the motor a few years ago and from what he is telling me, I set it up wrong and since a new cam is in order there may be other changes I need to make. The motor is bored .30 over with forged pistons, a comp xtreme energy Comp cam 268 intake 280 exhaust with the recommended 901-16 springs,800 cfm Edelbrock Performer carb and An Air Gap intake. The heads are stock X heads and if I recall theonly thing one to them was a valve job. I am running a 2300-2500 converter with 3.55 gears. It seems like from talking to him the entire set up is wrong. The car just doesn’t drive like I expected and I think its over carbed over cammed. What type of cam would be good for a mild street application. Will I need to change springs? Is there a way to tone down the carb or will I need to buy something smaller? I was also told that and MSD ignition would be much better than the Mopar Electronic “orange box” I am running now. I just want the car to be a lot more driver friendly than it is now. This is the first rebuild I have ever done so forgive me for my ignorance!