Let's get more technical. The terms used so far are high overlap cam and radical cam. So, the valves are lifting quite higher, meaning I need new heads to provide valve clearance. So, far my parts list is? high overlap cam, new heads...
Of course, this parts list will be benefitted by the classic Harley potato potato sound which is provided by a 45º cylinder angle and a 315º/405º firing order, creating the imbalance.