Plenty of ways to go, personally I would build a mild 650>750hp 572ci motor using TF270's or -1's (ported), use a $$$$ Indy block or similar aftermarket block as at 800+hp a stock block won't last too long, do it once. Then add NOS. It doesn't have to be 13:1CR, 11:1 will work and with the right cam still be premium pump gas friendly for the street, use 1 of Dominic's sorted dominators.

At say 3800lbs race weight you'll need 875 actual track hp to go 9.50@141. Use something like Mono leafs/caltracs and some good shocks, make sure your car is stiff enough to handle the mega torque you'll have....you should only need a 200>250 shot to achieve your goal...my 2c's.

We have a guy here in UK (Tig who is a member here) who runs a 3900lbs+ Challenger with a 572 NA motor, street car interior with stereo at I believe 11.1 last time I spoke to him, .730 Roller, Caltracs/4.10's/29.5" slicks and a single Dom, has run a best of 9.6@140+, currently running 2 x Doms and 572-13's and running 9.7's still needing a bit of sorting I think.