Just caught up with this sorry.
The engine was never removed during my ownership, nor the person I sold it to who owned it for several years(my uncle). Full BPU was done by Jurgen, boost controller was fitted under my ownership along with the HSD coilovers and it was undersealed and serviced regularly with Silkolene Pro S. The car also never had any paint during the time I owned it (I sold it in 2009/10 if I recall correctly). When I had it imported, it had the Trust Ti exhaust, Ohlins coilovers (I removed these, too hard for the road) and the Advan RS alloys.
I ran it at 1.2bar for the whole time I owned it, found it pulled better than other BPU Supra's I'd driven, seemed like it had a strong engine. All in all was a smashing car and never let me down. The only issue I had was a few teething problems after it was BPU'd but Jurgen soon rectified this.
Another member on here (Rich.2211) owned it recently, and it looks like he did some great work to it. He's probably a better person to ask about it