sounds like a stupid company policy if u can have a blower on a six but no v8![]()
and i assume uve seen this
http://www.capa.com.au/kits_holden_vzv6.htm
it says 300kw which would be fwkw so thats 230ish at the wheels.
you should see 13's with that setup but have no idea how ur box will hold up. id expect it to struggle however