Zippy, if the heads are milled it’s on the intake side since the bottom is where the gap is, bolt holes are opened up larger than stock (66 iron heads) pushrod holes in block are reamed out bigger to.
Cab, do you think it’s on purpose or just milling off? I was thinking because the manifold is aluminum and head iron maybe when bolted down and heated it might square up?? Really the only Chrysler engine with two different materials (other than the 6/barrel). I do like the bolts going straight down, it pulls the intake into each head instead of trying to pull to each side like the 440. Whatever way I do the milling it’ll be .020 more than the gasket I use to even up the ports.