Ok i have a 1995 mustang gt clone it has the gt rear end and motor trans everything the gt had i took off and put on this v6 the rear end feels like it sways from side to side has ever since i have owned it it did even feel right when i had the v6 in in tell you truth but now i have 1/4 wheel spacers on rear 17x8 rear rims tire size 275/40/17 rear and 245/45/17 in the front i have put tubular rear arms on in upper and lower( thought the bushings was bad so i put them on) and then i lowered in with Vogtland Springs still same thing the sway bar is installed oem what could this be when i hit bumps around a corner it feels like the car is jumping to the side its terrible the gt i had the clone car never did this