just buy my car it's for sale!i'm asking 4500.00 bone stock conversion.i can e-mail pictures if your interested.if you do the work your self it should only cost you a couple of grand.i paid to have it done and it cost me 2500.00.i already had the zx 5sp so this was for the engine and 75 280z gas tank.you'll need that gas tank for the conversion.this will cost you cosiderably less if you do it yourself.also upgrade the clutch to a centerforce or some kind of dual friction clutch,i had the stock clutch in and it slipped under hard accelleration.could have been a bad clutch though.they are alot of fun just stock alone but i'm considering going back to an N/A 240 with a hopped up l28 motor we'll see.anyhow good luck with the conversion.
you dont "need" it but it is preferred because it is a FI gas tank with baffling inside i believe but you can use your stock 240z tank but the fuel will need to remain pretty full so you dont cut out when you take hard turns.
it dosent cost much to do the swap if you can do it yourself. the hardest part is controling yourself to not go over board when your swapong your engine. for me (still in the process) i changed all the seals and gastkets, all the bushings etc.. new parts every where! my idea was "might as well do it now before the engine gets in and it gets harder to work on" and now that i said that i still have to finish the rear suspension and put everyting back together.
turbo EFI wire harness
turbo AFM and ducting
complete intake manifold with good injectors
downpipe with section of the mating OE exhaust system
EFI fuel pump
EFI Fuel filter
75 fuel tank or a suitable surge tank setup
if so then I would say 300 to 500 bucks for the engine in order to cover fuel lines, cleaning injectors, wire, relays ect....
plus whatever it takes to modify the drivetrain
it will take 40 hours of work minimum as well and if you don't have all the above, get ready to tack on time and $$$$$