Anyone want to talk Chevy! LOL

The age old problem!

“I have a Chevy! It’s awesome! It’s great! It doesn’t matter how big it is, it’s a Chevy!”
+25 for headers, + 25 for 4bbl, +25 for roller rockers. Chevy math is linear. It's the sum of manufacturer's claims. Just ask the guys with the 500 horse 327's. 435 horse 307 do-able? lol