I'm currently running 11.80s in a heavier 71 b-body (RR) with a sixty over, stock stroke 440. Stock six pack intake and carbs. I have out of the box Source Stealth heads and a Comp Cams 550/570 solid cam. Hooker Super Comps and 3 inch TTI exhaust with H pipe and some ancient 3 chamber Flowmasters, no tail pipes. 727 with forward pattern manual valve body and stock slapstick shifter. 9.5 inch 4,000 Dynamic converter. 4.10 gears and old Super Stock springs. I think 11.60s or .50s are still in my combo just waiting to be found.

I know some won't like to hear this and won't agree, but I see the 4 speed transmission as your biggest obstacle to your goals. I used to race a 4 speed car and I'll never do that again. Just can't beat a good converter and manual valve body.