Welcome! With your combo, the stock 318 heads are a limiting factor. I think the 302 heads were some of the best stock 318 heads, and I'm not sure that they'll support much more than 300 horsepower. If you want to go this route, I'd say it'll still be a fun car to drive. I don't know those cam specs, but I would be trying the smaller 262 with a stock headed 318.
