In a message dated 12/15/2005 2:12:15 PM US Mountain Standard Time, pp2 at 6007.us writes: Starting in 1965 and optional in the Monza but standard in the Corsa was the 140 hp HP engine also at 9.25:1 compression (PG only available in the Monza 140 hp engines were also an option on the 500s, as were Powerglides Regards, Bob Helt