[1BAD5.0]

I have a roller 302 that want to use e7 heads on. They have been mildly ported other that that it is completely stock. I have a .512 lift .220 duration @.050 camshaft that i want to use. I have some telling me i will have a valve clearance issue. What is everyone opinon here. I also would like to get some idea of what kind of horsepower I am looking at getting. I am using a weiand excellerator intake and 2.5 in exhaust with flowmasters. Any input would be helpful. Thanks.....Todd

[EagleAutosports]

Hiya, welcome to the site.
That .512 lift is about the max I'd recommend using with stock type pistons. They'll be close, it'd be a good idea to check piston to valve clearance to be safe, but I know some that have used it with no problems. It's also about the biggest cam you can use with E7 heads before they run out of flow. With just a swap to this cam, nothing else, would give you maybe 10-15 hp more. With more mods, like better heads and intake, it will be more. In your case, I'm thinking 20 hp above 4000 rpm.