Yep, go for it. Sadly, teens don't get put on the dyno very often so there's not a ton of numbers out there. Hot Rod magazine built a 400 horse teen (supposedly) with zero deck pistons, a 230°/.512 Comp Cam The lift was using Magnum heads and their 1.6 ratio rockers. Intake was a MP open plenum with a 750 Demon etc, etc. Here's a link. I think a zero deck Teen with some mildly massaged Speedmaster heads and the right cam could get to 400 horse easily.
https://www.motortrend.com/how-to/mopp-0409-318-engine-build/