I don't want to loose low end power this guy is a well know engine builder here its only around the guide boss that needs a clean up as edelbrock don't touch the casting around the guide boss as it takes time and will have a affect on the retail price . I should off said clean up as people know porting as making the ports larger todays its changing the shape of the port that's important not size--that's why these new style v8 go well the heads make the power
