Retaining the stock computers makes 1 aspect of engineering & registration simpler If in Vic.
It's in accordance with their emmisions regulations, If starting scratch you need to pay for an emmisions assessment - An IM240 which will give you complete coverage of ALL the emmisions related mods done - injectors, turbos, the lot!
That certificate is about 1k ontop of the rest of the engineering costs if all goes to plan.
As for actually wiring up a new management system, Its really not that hard.
Retaining parts of the old system like sections of loom and connectors can make things a lot simpler, but the basics are the same. Its amazing how much you pick up and learn along the way!
I used to own a 1uz - w5x series adapter plate and hydro throwout bearing setup from a guy in the states that I was planning on using, but the age and price hike on the w5x boxes & r154s was horrendous.
I then bought one of Mikes whiteblock - T5 gearbox plates which I still have.
Im waiting for John Johnson's 262s engine to shit the bed so
@VPT02 and I can drop a real engine into her :)
You can retain the 960s engine mount brackets, coupled with a nice thick alu spacer, a set of stock 240 rubber mounts & some custom subframe brackets for a nice clean setup.
Ive had some bits sent off for measuring for gearbox options and should know soon enough for my own 240 T5 shenanigans