If you were recently messing w/ your timing....go and check that your SPOUT connector is back in....I left mine out 1 time at the track and then lost it...Car ran fine(no sputters or missing) but about 4-5 tenths slower.
I popped my buddies in and....presto, back in action.
I didn't check your 60 ft's , but 266 hp, even w/ your auto should get you into the really low 13's..on tires that is.
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4.10's,long tubes & 75 shot...Goes 12.50's
Check it out at
http://www.burnouts.webprovider.com