Another 318 Build... Surprise!

Post #1 says zero about a stroker so the overbore will only net you about 5 cubes, which at an increase of just 1.56%. really amounts to as good as nothing.

IMO, you are about to build an ugly combo.
IMO you should make a list of what has already been done, and a list of what bolt-ons you have already purchased;
then let some of the guys see if they can straighten it out for you.
IMO, the low-gear 904 and 3000stall convertor will be fine because the 66 Coronet looks a lot heavier than it is. The 3.23s will be fine, for at least a little while, if you build your engine right (see below).
There has been a lot of scuttlebutt on FABO lately, by very knowledgeable members, about the 302s NOT being the best choice, and especially with the mods you are considering.
IMO, as for the cams you are considering; those two are diametrically opposed, and should not even be in the same paragraph never mind the same sentence.
IMO, all in all, your selections seem to point to a lack of knowledge/understanding, and or direction. Please, I urge you to reconsider and let the guys help you straighten out what is IMO, rapidly becoming a mess.

If you reread the OP the mention about adding cubes is going from a 273 to the 318. The summit cam is already in the 273, the second cam would be in the 318 or maybe the 360 since I'm leaning towards this idea. As far as the 302 heads go, yes there are better options if you choose to spend the money. The point with me using these is I already have a completed set with the larger valves, ported, cut down, new guides, springs.