Yes different route altogether. I have a set of X heads. They were freshened up to stock specs by same machinist that sold me the short block.
I might tear them down and redneck/diy port them myself when I get to that point.
Or I have 302 heads that need a valve job or 2 other sets of 318/360 heads.
As of now I plan on using stock adjustable 273 rockers that are in cuda now.
Basically a set of gaskets and motor mounts should be all I need to buy. (For now).
Block is a 340 70 date code, so I will have to get a 70 FSM to get those specs. I have a 69 but there might be variations. I think crank is drilled for 4spd as well.
Gotta get one of those 318's off the stand lol.
Cheers!