Have a look at this link , you will see a lot of street driven gtrs doing low 11's on street radials and normal weight , around 1500-1600 kg . Try that on a Holden V8 , any Holden V8 .
http://www.skylinesaustralia.com/forums/timeslips.php?
The HQ Holden that will do 8's will be just a shell and a purporse built drag car costing aound the $100 k plus . There will be no 308 in there i can assure of that , she will have a huge V8 , probaly a big block Chev and a huge blower over the bonnet . She will be tubbed
with huge drag slicks and weigh well under the street weight of a HQ . A normal HQ V8 kingswood would weigh around the 1400 .