Well, just got her on the dyno this morning and pleasantly surprised.
Only mods I can see are an aftermarket air filter (although I am now on the lookout for original airbox if poss as this has more rust on it that the Titanic lol), dump valve and 1 bar loop.
The air/fuelling was fine, around the 14.5:1 mark and consistent throughout the runs.
The boost peaked at around 0.9 and dropped to around 0.77 at top revs
Flywheel power was 261bhp and wheel power was 183bhp
Pretty happy, airbox and poss FMIC at some point and that should be it.