I’d go with 83-84 for the East. They had 6 of the top 8 teams in the league in wins (1-Bos, 3-Phi, 4-Mil, 5-Det, 7-NYK, 8-NJN) and net rating (1-Bos, 2-Mil, 3-NYK, 6-Det, 7-Phi, 8-NJN). They had the league MVP (Bird), DPOY (Moncrief), and 6MOY (McHale) and the NBA champions (Bos).
I’d go with 83-84 for the East. They had 6 of the top 8 teams in the league in wins (1-Bos, 3-Phi, 4-Mil, 5-Det, 7-NYK, 8-NJN) and net rating (1-Bos, 2-Mil, 3-NYK, 6-Det, 7-Phi, 8-NJN). They had the league MVP (Bird), DPOY (Moncrief), and 6MOY (McHale) and the NBA champions (Bos).