Hey everyone, I have a 69 convertible. Over the last two years, I have had a 3.90 posi installed and a Tremec 5 speed overdrive manual transmission. I like the way it rides now, but I am not 100% happy with the engine. The engine is a 400 from an unknown 1972 Pontiac with unknown mileage. I always knew that one day I would want to have it rebuilt.......I am thinking about possibly having it done this winter. I have no idea what horsepower this engine is pushing and would like to know how to find this out so I can start thinking about how much additional horsepower I would be looking to gain with the rebuild. Thanks for any help. John
