I have been told that you can possibly fix the head. It is just a matter of having someone do it. I believe the best way would be to take it to an aluminum welder and then to a machine shop for them to stud it and make sure the oil jacket is the right size and not plugged up.

Heres the parts list and prices
PARTS FOR SALE:
engine& trans-$1200(head needs to be welded and redrilled for exhaust stud)
ACT 4 puck(less then 200 miles)-$250
mckinney mount set($200)
Custom drive shaft-$300 obo
Complete wiring for series 2 rb25 into s13-$500 WITH STOCK ECU
Greddy E MANAGE ULTIMATE with harness for rb25/26with a switch of a wire plug and play-$400
KOYO RAD- modified for intake manifold- $175
BEE-R revlimiter- $200
T67 turbo (ebay)-$300
Ebay exhaust-$100
will sell turbo set up with everything to bolt on for $700(included wastegate and lines!)
deatschwerks 550cc injectors( used for less then 300 miles) $400 (ebay price is $480)
n1 water pump BNIB ($200)
Tomei timing belt BNIB($130)