just got a 2003 10th vert its got a 2.93 upper fidanza 4.3 clutch and catted x pipe with bassani catback...weird thing is when shifting from 1st to second on a spirited run and even from 2nd to third the car will clunk and bog down for a like a split second before the gear engages.....at least this is what it feels like...i know tire spin and it isnt that....also sometimes the car does not wanna shift into 1st gear while at a stop(very rarely)...i guess it is also good to know the throw out bearing is always squeaking upon shifting of gears...i was lookin at throwin some $$$$ at this car to go faster not for repairs.....does anyone know what this is? also ps: traction control is turned off.