What mods have you done to yours evilef? 174kW is pretty impressive for an na v8

i have done, over sized pistons (acl race series) lightened and re shaped crank. zero decked block. stage 2 trickflow alloy heads and matched intake. stage 3 cam. custom stainless steel valves. aftermarket computer (autronic) i recommend highly. bigger fuel rails malpassi fuel regualtor. thas all i can think of at the moment

oh yeah, and of course a 70mm throttle body. i also dynoed it with the pod filter off and it got 178.3 at the wheels. but the exhaust is a bit restrictive now

Impressive. Well if you can beat a supercharged stato now imagine if you put a blower on your, you should

i want to so much. but i cant afford it at the moment. all i need is something to run 4 to 6 psi and ill be happy. maybe 1 day. the guy who does all my tuning holds a couple of records. he holds the record for the most power at the wheels for a 5 litre. its was in a commodore, but he got 1000 hp at the whhels on a road car. and also he builds manifolds for a big work shop in melb called brecani's. they mostly do turbo vl's. but he wants to turbo my 5 litre. he thinks it would be a hell of alot better but it might cost a little more too.
so i would probably stick to supercharing, but turbo would be a little different.

getting back to the original topic, the cars are obviously not too far apart as far as power goes so that tells me that the dyno readings are out. were both cars done on same day on same dyno? if not then obviously there are some other factors pumping up his figure. maybe calibration issues with dyno.