273 or 225?
Idc what the OP runs as long he's gonna be happy with his decision.
I'd probably pick neither and go with a running 5.2/5.9 Magnum with 4bbl and mild cam.
A performance /6 is a labour of love not a wise economic power to $$$$ and is severely handicap in the NA power department to say otherwise is a lie, saying that I love seeing built sixes and would love to have one, one day.