Sure, man--no problem. Check the turbo first...
If you do end up needing to do the valve stem seals, I did this at the same time:
-bought a full 4g63 engine gasket set ($140 from PartsDinosaur on ebay--made by ITM Components and includes HG, VC Gasket, injector o-rings, turbo mounting gaskets, and everything)
-bought ARP head studs ($95 on ebay)
The ITM Components OEM style composite headgasket seems to have sealed well (thanks, Jake
), despite me not getting the head resurfaced. If you go with a metal HG instead, you might want to think about a resurfacing. The new HG and ARP head studs have held 20 psi on the EvoIII 16g just fine so far...and you'll have extra gaskets in the kit for replacing any other pesky problems that occur down the road (injector o-rings, crank/oil pump sprocket seals, oil pan gasket, etc.)