i have heard a bunch of dif. opionions on rear end gears for a 5 speed sc between 3.08s and 3.27s. what would be the best for a stock car now, but has plans to mod it pretty well in the future (mid-low 14s by the end of this summer, high 13s next year)??? i also want very good highway gas, can some of you guys with 327s tell me what gas you are getting? thanks