Re: MR2 AW11 1B, Bigport to small port conversion
IMO, go straight to an aftermarket computer.
The flexibility in even the most basic of available units these days blows the doors off the crappy 1980's tech that the stock ECU's utilised.
Adaptronic M1200 ($990), Haltech Elite 750 ($1495), Link G4+ Atom 2 ($985) or a MicroSquirt ($650) will all handle standard functionality required for a small port 4AGE while leaving you with plenty of flexibility for the future.
TrackDub - 89' AW11 3MZFE | SlushDub - 89' AW11 4AGZE | DailyDub - 02' ZZW30 1ZZFE | TurboTaxi - 99' GC8 WRX EJ20