As long as head is getting work, give them your intake manifold, too.
At very least have 'em match up intake runners on manifold to ports on head.Also have 'em relieve all the sharp edges in comb chamber. How are your valve seats?maybe reseat with bigger valves while your there. If you've got a little money to spend, ask 'em to grind the bottom of the intake jrnals on the head to increase the short side radius, just a little.
If you've got a lot of cash, ask 'em to weld up the combustion chambers to increase comp ratio, and if you wanna go way out, the sleeves in the exhaust ports can be removed.