I know you said "NA" and there are plenty that do that. However, they are probably pretty radical and expensive motors not to mention the gearing/converter you have to use.

Just curious, why "NA"? Class rules, etc?

I ask because a single turbo and a decent motor will get you there easily and it will be super driveable.

I am at 3,480 lbs with a "Magnum" series stock block motor 389 CI, home ported Eddy heads, .520 hydraulic roller, 9.5:1 compression, T4 78mm turbo, 3.55 gear, 3,500 converter, shift at 6,000 cross a 6,000, through full exhaust with power steering, power brakes, etc. So far on only 13 lbs of boost I have run 9.9's. I am going to up the boost this fall to 17 lbs (which is about the limits of this "cheapo" turbo) and should be in the mid 9's at almost 3,500 lbs. Drop the weight to your 3,100 and it is still a little short at around 9.teens.

The goal of my truck was 10.9's and it was built with that in mind. But I plan to upgrade to either a better T4 turbo or go with a T6 88mm and should be able to run solid 8's at almost 400 lbs more, which is your goal.

Just my .02