You will all on this list just to get the car running with a RB26DETT
-A Modified ZR200 Oilpan (from Japan)
-Custom oil pickup
-Skyline GTS clutch
-Skyline GTS 5-speed (The 6-speed is AWD)
-ZR200 motor mounts or a set of custom ones
-Custom transmission mount
-Custom drive shaft of the front part from a Skyline GTS
-Intercooler
-Big fuel pump
-Custom Throttle cable
-Custom down pipe
-Custom Intercooler plumbing
So I would bank on 10,000$ just to get it running, If you do all the work your self. And you will be left with a 350-400hp Zcar that is DANGEROUS , so now it is time for a roll bar, big brakes, better suspention, subframe connectors.