Problem with having someone build you up a set of ported performance iron heads is the cost.
You'll have more in them than a set of Aluminums and to what advantage?

I like Iron heads, but unless you just want the look of them it's tough to beat a set of E or KRE's out of the box cost wise.

Now, for a low buck home built grunt engine take the smallest chamber big valve head you got, hand port them, have a local shop cut the spring pockets for new springs and set the spring height for whatever cam you choose, install new SS valves and hardware, and port match the intake. Mill the face and intake surface .010
You'll still have about $800-$1000 in them.

Build the bottom end with forged rods, forged pistons, cast crank and deck to .005 in the hole.