Funny, I don't see the overweight LS-6 being on the top of the list as far as ET's are concerned? They were a bit limited in availability to about 4500 in 1 year of production, and I honestly don't think it has much of an advantage (other than Hp rating) over a a L-78 Nova? I happen to know of a '69 L-78 Nova, headers slick and re-curved dist and it was an 11.70 car back in 1969. PLUS it was available for 3 years (68-70) and was a bunch cheaper then the LS-6.
Is this not exactly the reason Don Yenko waited for a COPO version of the Nova 427 before he would jump in with a YSC version? Curb weight of a SS396 Nova 4sp "on-line" is 3370 as posted here:
http://www.automobile-catalog.com/ma...e_ss/1969.html
Curb weight of a 1970 SS454 4sp LS-6 is 3743 as posted on the same site:
http://www.automobile-catalog.com/ma...e_ss/1970.html
So a 396 Nova would be 378 lbs lighter and we all know the L-78 can run HARD as well.
Therefore, I really think the SS396 Nova we the actual street KING. ET wise, there were very hard to beat, available for 3 years with hi compression, and low buck so more could afford them.
Then you can talk about the COPO 427 Nova's!!!! Only the Zl-1 and the A990/'68 Hemi cars could run with that beast.