Also there is NO 1.5. Its either a series 1 or 2. When I worked in a Jap parts shop we always had people saying they had a 1.5 and the Jap manager always said "whats a 1.5?, there isn't one"
Its just a series 1 running a s2 engine during the series change over, they never called it a 1.5.
Sorry to babble on this but it always p*ssed me off when people said it.