help me to understand cams

the 408 is just going to be toy, hit the streets, and track i doubt if the car will see 2000 miles a year Im looking for a very healthy very nasty sounding sb. the car is a 4spd and im not too worried about street manners as most of my cars dont have much for those. I love th sound of the thumpr cams but there performance is terrible, id like to have my cake and eat it too.

A tighter lobe separation (106) will produce a nastier idle. Power is a little "peakier" and drops off a little sooner than a wider lobe separation so you may have to run some more duration to make it spin up more rpm's and that'll also add to the nasty idle your wanting. If you go this route make sure the heads and compression can support it or you'll just have a nasty idling pig