Should I leave it Stock?

It would be interesting to build a zero deck flat top 273. The heart shaped combustion chambers would love it. It would run as good as a domed HP piston engine. May be better.
I am tempted. I have considered pulling the heads and doing a port/polish job and some decking. Once I start taking away material though is when things become non reversible. I can see myself sending the heads off the machine shop for a simple clean up and "accidentally" having some other work done.