Hello good people! Question time!

I'm running a 3.5L NA engine, with 272's and soon to be extractors and 3" exhaust. As far as mods go, It's also got adjustable cam gears but they are set at 0 for now. More for da bling.

Anyhoo, After months and months doing an entire body loom swap, I've finally got the car running on a TT Chromed ECU from Jester. Now, I suspect one injector is faulty but I'll deal with that tomorrow (and that injector will be replaced this week)

Running a stock MAF, stock fuel system. Throwing a CEL which I'll hopefully have time tomorrow to find out which CEL it's throwing.
Just wanted to know, besides an injector re-scaling, I'd like to keep the fuel and timing map of the TT as it's a bit more aggressive than the NA Map, what else would need changing?

After the car has had the entire exhaust system made up on and put on I will be getting a proper dyno tune (only driving a mere 10 hours for it....only 2 tuners in Australia I trust...) and having all these issues fixed up.

But yeah, the car runs no EGR, no Active anything, it's as basic as you can get (not even ABS) I was hoping to get a mail order ROM that would suffice until then, that just didnt throw a CEL, and possibly had the TT fuel/timing maps but scaled to an NA ROM (better resolution)

Thank you gents!