sounds like you want a stock convertor with a shift kit installed or increased line pressure via LS1 edit. any aftermarket stock convertor will take its toll on a stock 4L60e - i have a yank st-4000 but it is far from a daily driver. if she doesnt want a race car give her a stock car. putting in a convertor under 3200 rpms is a waste in my opinion from a performance standpoint. also remember that vig convertors stall way higher than advertised. about 400-500 rpms higher. so a 3200 stalls at a real work 3600-3700 rpms at wot.