effect of rearend gearing on ET's

screwed around with it a little more...if i shift at 5800 theres an increase in my et....it says that the redline for my engine is 6300 rpms, and it seems that the best times im getting after trying a few different shift points is at 6300 rpm...Also, i looked into what burntorange said and yes if I am using the 3.23's it says that i wont even hit 4th gear during my pass...anybody else want to lend a hand? thanks so far guys for the suggestions