OK so was it a dumb question or am I just asking in the wrong place?
As an addition, my mate has told me I'll need a new flywheel and clutch kit, because he reckons the EJ22 NA ones won't fit up to the EJ20T, does that sound right?

Hey thanks for the response.
Yeah I thought that may be the case too, about the auto ecu being part of the engine ecu. If it's still going to work I don't care too much about the check engine light being on, as long as it starts and runs ok.
In terms of the flywheel and clutch kit, I'm running a non-turbo gearbox, but am hooking it up to a turbo engine... so not sure if that's an issue? I didn't think it would be but he's telling me it is, I have no idea why, he hasn't even picked up the turbo engine from me yet, just pulled out the NA engine. And is it worth buying a turbo box or not? Another mate of mine that works at the wreckers said that he thinks the engine won't put out enough power to break the non-turbo box, though he tends to downplay that sort of thing sometimes as he is a high-power nut that is constantly rebuilding engines and doing mental things with them, so anything that's not high-power he thinks is pretty ordinary.

Ah ok, nice. That at least saves me some bucks, phew. I can just see my wallet being flushed down the toilet already so that's a welcome surprise haha
I'm also curious to know, right now I'm tracking down a dump pipe, and it's pretty slim pickings. I've found this one in america - http://cgi.ebay.com.au/ws/eBayISAPI.dll … K:MEWAX:IT - no idea of postage though, waiting to hear back (pretty sure it fits the back of the turbo, it looks like it would - http://www.saluda.com.au/images/ej20-turbo-flange.jpg ). The main problem though is there's no cat on it. I assume I'll need to weld a cat to this? Thinking something like a basic ebay job - http://cgi.ebay.com.au/ws/eBayISAPI.dll … K:MEWAX:IT - but again it's all pretty new to me. I don't want to go crazy with it but I don't want to do it all dodgy either. But ultimately I just need the damn car ready and back on the road as at the moment I'm driving my '78 Corvette every day and it sucks down fuel like it's nobody's business (hence it's usually my weekend driver!). Sure get a lot of looks though, taking it to the shopping center and the like haha.
Thanks again for your help

Well, it is a sexy car, but driving it every day just accelerated some of the minor problems I was having with it into major ones. So while it gets me from A-B, it's becoming really annoying having to deal with things like windscreen wipers not working, and it's running on 7 cylinders for some reason. Obviously I've started looking for why these are happening but haven't uncovered anything yet.
In terms of the suby, I thought there might be something around but wasn't sure where to start looking. Will check out x-force, thanks for the tip.
The cross member thing, no I don't. Wasn't aware they were different. The guy doing the swap has experience with fabricating different kinds of things so he may end up just making or adapting something. Failing that I'll have to track one down. I'll wait for him though, it may be a minor speed bump for him and not a major problem.

Looks like X-force might have something in the way of dump pipe so I'm waiting to hear back from them now.
Do you know whether I need to run a cat converter with this? I can't seem to find any conclusive information on the subject.

And while I don't want to do it on the dodgy, I may go down the "cut a section of the crossmember" route to save some bucks, if it's not going to create any issues for me down the track. He might have some other ideas about reinforcing it anyway, and I'm not exactly going for something that looks pretty, it's not a show car, I just want a nice daily.

OK so it turns out I need a new cross member. I have no idea what kind of cross member I need, but all the guy doing the swap has told me is that the stock one in the car doesn't allow the engine to fit in. So does anyone know what kind I will need and where I can track one down?

Engine is in, but the guy doing the job has opted out (for various reasons). So now I have a car with an engine that's bolted up but isn't wired up, and none of the intercooler and exhaust has been attached yet either. As much as I'd like to tackle the job myself, I think I'll need to pay someone to do it. I spoke to Autocraft (who did the original conversion) and they were rude and didn't want to know about it. Surely this can't be THAT hard to get back up and running? Anyone want to do a cash in hand job to finish it off for me?
Otherwise I may just end up selling the whole lot... which I'd rather not do, but it could be my only option.