No, you can't use the cams still, id help you throw it on there, the only thing I don't like doing is actually torqueing the head, not having a lot of expierence doing it I would not want to take the risk of doing it on someone elses car and having it not seal properly becuase thats an expensive mistake,
I wasn't thinking you were a "bad" driver, but maybe the increased performance caused more tire spin you were not used to, or shift points and times you were not used to, creating a slower time, also I was thinking maybe you got into the, "alright now im gonna put down a real fast time" mentality and over did it on the launch or something, BTW what were you 60 fts for this time and last time?
Also, id be VERY careful with E-bay burnt chips, do some searching around here and ht, I know I have read stories of people having lots of problems with them, maybe there is a good seller out there that other people have had good luck with, but yeah be careful of the burnt chip. Where was your hp curve peaking at? if it never peaked, then the increased rev-limit will definitly help. ALSO im not 100% sure how it would work together, but either make sure that the chip is only rev-limit so as not to mess up your tunning air/flow, ignition, etc..