Hey jimm, funny we were just discussing converters at work. Good idea not to buy converter until you know what your average r.p.m. is while driving(determined by your rear) and keep you stall speed below it. If you average 3,000 r.p.m. going down average highway stall speed should be below that. You don't want her slipping in and out while driving around, it'll wipe out your trans eventually.