This guy claims 146HP at the wheels on a hybrid A1/A2 engine.

http://www.sigma-galant.com/viewtopic.php?t=7976#p70483

Pennyman said John Baker claimed 160 at the wheels out of a G54B with the Mikuni muscle cam, Tri-Y headers and side draft Mikuni carbs.

So is the Aussie guy bullshitting or what?