10 sec 6.1 ?

I know of quite a few stock block head, cam, ported intake manifold LX running high 11's that are in the 4400 lb range so the same settup in a 3000 lb A body should get it done. The rest of the chassis will have to be up to the task but considering most of the LX's running those times are running a 3000 RPM stall and most are stock 308 gears. If you went bigger on the stall with an A body and optimized your gears then you could cam up a little and maybe run a mid 10. For instance,,, alot of the LX's in the 11's are running a 218/222 duration on a 112 LSA on a stock block you have to limit your cam advance to about 114 ICL for enough valve to piston so you don't want to go any bigger on the intake duration because you loose too much bottom end. But with a lighter car and a high stall like 4K or more converter you could run something like a 226/230 duration and just retard the cam enough to clear the intake valve with the piston which should be about 118 ICL. This cam would be a dog in a 4400 lb LX with a 3K stall but would likley work well in a 3K pound car with a 4K+ converter. Saying the LX's with the 218/222 duration cam, heads and ported intake average 450-460 RWHP thru a full exhaust with cats the bigger cam would likley make 480 with everything being equal then you can pickup some more without cats or even more with an open exhaust. I say 10.5 is easily within reach. It would just have to be done right.