ok here is the info i got from them about a year ago

http://www.allengineparts.com.au/Default.asp?p=1

4D55T NEW BARE CYLINDER HEAD AUD$600.00
VRS GASKET SET AUD$60.00
FREIGHT TO USA - AIR 7 to 10 DAYS AUD$275.00
ECONOMY 2 to 3 WEEKS AUD$235.00
CHECK IF INJECTORS THAT SCREW INTO HEAD ARE 20mm or 24mm
REGARDS PETER

I recommend just getting the headgasket from the dealer thats what i did.

89 2 dr turbo diesel
89/88 "Backwoods sas"