323 gears in the eigth ?
sounds like a strong motor, you will have a pretty tall tire son it may be a little sluggish, if you want the best time possible i would prob go with a 391 or 410 and still stay streetable, dont think 355 would be enough difference for the money, but if you like the give you have would stay with a shorter tire and run what you brung and be happy, good luck:D