Making power out of the 318

Its a teen thing like if you have a big cam it mens its fast I guess
Sounds like the neighbor boy, just a tad older than you. Has a rusty Dodge camper van. Said it has a 383. Nope, a SBM and more than likely a teen. Then he says it has an RV cam because of the exhaust rumble. I could not resist then. That is because the muffler is rusted mostly off.
His older cousin is full of manure and makes it sound good, so he listens to him. There is about 10 of them and first thing they do is remove the mufflers at the direction of the leader of the pack, the older cousin.