Disappointing ET's with 408

Ok,heres some advive from a guy running 11.0's in his street car...mines a 416 stroker but other then 8 more cubic inches its a pretty similar setup to yours,yes if you have access to a chassie dyno that would be nice seeing as the engine is already in,but from my experience with them dyno's are NOT all they're cracked up to be,had my car on one last season the adjustments that were made looked good on paper,but at the track(where it counts) the car actually went slower,put everything back to where i had them,results car back to running the numbers again,there is nothing like "real" world results,that said the dyno is good to a point,but theres nothing like test/tune to see what its really got..My advice to you a Quick Fuel 850 carb or similar,deffinately a good electric fuel pump,at least 3/8" fuel line tank to carb,deffinately a good set of headers(tti's prefered here) 3" exhaust,and more converter something in the 3500-3800 range,and a different brand tci's don't have the best rep for making a quality product,sorry for being a little harsh but you asked for advice and i like being truthful,,also if you already had'nt put the motor together more compression would help too...On another note once you get the car running properly you'll need to get it to hook,but we'll deal with that after you get it running like it should..