A 326 bored .060 is only about a 331 not a 400.
Keep it simple, run a summit 2800 cam, or better yet a comp cams XE 256
If your heads are 65 CC then your static comp will be 10.5 ish to 1
you'll need to run alcohol to keep from detonation. But if you can get alcohol...very good for you. I cant where I live , I wish I could.
Run a dual plane intake, stock is actually pretty good.
Fact is stranger than Fiction