No cage or no roll bar? Need a roll bar at 11.49 and a cage at 9.99 last time I checked. If your doing 10.90s and need to go 11.50's, def unhook the 4 bbl. We did this with my wifes car and it was darn near spot on 6 tenths slower. If when you unhook the 4 bbl it still a tad quick can always add some weight in the trunk. We also wired the 4 bbl shut as I've heard that at times they can slightly open going down track due to the air, but not sure if that's true or not.
