What should I expect from 450hp?

To big of a cam for that low compression. Plus 323's are for cruisers. Get some 430's. Put a plate on it with a 150 shot. Then you will be back on here asking what should I do to get it to hook up. LOL

that cam is fine for 9.5:1 compression. i've ran way bigger cam , 621 lift with 9.5:1 compression. and i also ran 3.55 gears