Originally Posted by ss396si
I have a 75 305 in my chevelle,How much HP can i make from this engine? I have the edelbrock torker intake and cam in the stock engine when i bought it. Is it worth heads and new valve train?
Yes and no! 75 is a horrible year of Chevy struggling with emissions. the heads aren't good, so replacing them will boost power, especially if you look to Vortecs. The "no" is that it costs as much or more to build a 305 as it does a 350, and the 350 brings a lot more torque to the game. So why not start with a 350?