273 or NOT 273?

Correct me if Im wrong but isnt the parts selection for 273s limited? things like gasket kits that don't work or aren't available? OR is it true that a fel pro gasket kit is out there for 273? i think in terms of overall headache on a build .

You are misinformed. 273 uses everything the same as a 318 or 340 except pistons and rings.