273 intake/valve cover bolt torque

I take it that's ordered in bolt sequence? So first bolt to tighten is dead center, passenger side (or driver?)

Awesome, Yeah I think I may just do the valve covers like I did my jeep valve cover. hand-tight, barely snug with a socket, then 1/4 turn each bolt until no other bolt is loosened by tightening another one. No leaks on the jeep so far...

Yes. thats the order. Pick either side but do not torque all the way. Keep snugging each bolt in sequence a little at a time until you reach the torque spec.
Have fun