Small update.

First MOT of my car with a 4.2ABH running with PT ECU, electrics, and fuel rail. ABT chip.

Emissions passed
120ppm on hc
0.78on CO2 for emissions

I've not done a dyno run yet- not enough time. But performance wise it's great.

It really is as straightforward as has been suggested

85 WR quattro
90 V8 Silver, 91 V8 Black, 93 V8 Lago
93 100e quattro V6. Titan, i think