well the 373 are in and the auto shift kits in, this a new feeling for me with the shifts much faster and harder. when im coming to a stop and the gears in the auto are down shifting, it seems im getting a kinda clunk sound rite before i come to a complete stop, now the mechanic said the gears are real tight now so i will experience that feeling. other that that it feels great , i havent really got it on in it yet, he said to wait about 200 miles before really romping on it. so is there any other things i should be listing for while driving. plus what type of speedo gear goes in it, we went from a 18 to a 20 but its still off, any thoughts woud help thanks gil