I don't think there is much question whether 400 cubes can do the deed. There's no replacement for displacement but 13 cubes won't make or break you here IMHO.

If you are using the stock short block with pistons .100"ish in the hole, compression will be less than ideal so I would want to use the best head I could lay my hands on. Any of the heads you have can be made to work for you but even the cost of a good rebuild and valve job will at the very least approach the cost of Stealths or Eddies so I would try and get a set used and reap the benefits of an aluminum head for very little additional cost. Best money you can spend.

Assuming the short block is sound I would try the MP509 you have with a set of RPM's and the tunnel ram and call it a day.

Kevin