With exhaust manifolds, the Comp Cam 255DEH is what I would use.
With headers, A Comp 265DEH or the XE256H witch I think would offer a hair more torque than the DEH. The DEH would give a hair more HP up top. I think it's a split.
Between the Lunati's, the "402" is what I would use. It's RPM band suites the gear ratio best IMO. Though I like the "401" better than the two choice's you gave me.