If you've listened to Tommy Heinsohn talk about running basketball, you might get the idea. The 70's Celtics were built around a relentless running style, and Havlicek was the perfect star to make it work. Many of their fast breaks didn't need a single dribble.
They would have fit in perfectly in today's NBA. The guards were big and the front court was small. Cowens was a small ball center and Havlicek was a small ball wing. They were great defenders and had amazing rebounders and ran you into the ground. Almost all the offense came off picks and motion.
Havlicek had a very soft shot and always shot on the move. Almost never went iso, and still was a reliable high volume scorer.