Excellent, thanks very much moonstone that is very helpful! I have gotten off the phone to my mechanic and one of the guys in the club and the club member got an auto electrician to wire up his EFI for about 1000 after he installed all the other parts like ECU harness injectors himself. I didn't talk to him about the ECU though, so I'll have to have a chat to him about that. My car mechanic, not a huge Z fan, suggested buying a Nissan Patrol engine, the single carby L28, dropping that one in and selling off the old engine. (or not and keep in the shed for a future conversion when i can afford it ) He said he would charge 200-300 for that job so I would end up paying that plus the cost of the engine, (1-2K?).
So my options are:
Attempt to convert the 2.9L L28 back to EFI keeping high compression and putting a standard cam back on: Dues Ex just replied to my email and said that the conversion was absolutely possible I just need to buy the wiring harness, surge tank, fuel pump, ECU, manifold etc. Probably looking at 1000 for auto electrician, approx 400 on the parts (car club member said he could sell me almost all of them). I would install almost all of it with help from that club member and then send it off to be wired up. Risk is that I'm not sure the conversion will sit well with all the parts, like the ECU. Cost : $1500-2000
-or-
Buy an L28 (apparently between 300 for a 2nd hand one and a LOT for a reconditioned one) from a club member off a 280zx, buy all parts and get mechanic to install then auto electrician to wire up. Probably end up spending a bit over 2K (1000 for wiring, cost of engine + parts, cost of mechanic) Cost: $ 1700-2400
-or-
Buy an L28 from a nissan patrol, drop it in and dont worry about having to modify much. Cost would be 1000-2000 for engine, 200-300 for mechanic to put together. Cost : $1200-2200
I'm just guesstimating these numbers, but at least I now know what my options are and have an idea what its going to cost me when I go look at the car.