1.6 rockers with this combo?

I don’t think you’ll get more mid range in any meaningful amount to jump and shout about but you should gain some top end. This amount is completely dependent on the head flow numbers to even guess about. Plain and simple, if the head supports more air and fuel flow, you’ll make more power up top.

Personally, if you dyno this engine, I got $5 that it’ll make 430+HP. Might see 450.

What are you doing for header pipe size? 1-3/4?
That’s where I’d go.