Engine is pulled - 273 rebuild or replacement 360 crate?

Too bad you are not closer, I have a few extra 273 standard bore blocks. I even have a + .040 273 block from my 64 Barracuda you could have. What trans are you running? At this point, early 318 with thick walls and the 273 top end? Or a 360 top end? What would you want if starting from a clean slate?