xp cam with 130 lb springs rev limit

[SgtMarshal]

is 6388 too high to rev an L67 with an XP cam and 130 lb springs. I set the rev limit at 6300 and of course it wont shift exactly where the limit is set so it ended up shifting at about 6388. I'm trying to squeeze out a faster 1/8th mile time, so holding first gear at higher rpm's should help, I just don't want to blow the thing up. the transmission is a built dynotech and is supposed to have all the bells and whistles.