Head ticks may be common, but they certainly aren't normal. And that doesn't sound like a tick, it sounds like a knock. But what do I know. Either way I stick by everyone's sentiments here - buy it and drive it until something happens.

Oh, and here's my 306,000 mile Marauder at idle. Timing kit was done recently but as far as I know, it's still all original in the nether regions.

306,000 mile Marauder at idle - YouTube