I JUST FINISHED MY STOCK 52' 4400. NEW TIRES, BRAKES. THE STEERING IS TIGHT AND THE TRUCK HAS 23000 ORIGINAL MILES. I TOOK IT TO 52 MPH ON A FLAT PAVED ROAD. IN A NUT SHELL, WEAR DEPENDS. HIT A BUMP AND ITS A ROLL OF THE DICE FOR CONTROL. UNDER 40 MPH VERY MANAGEABLE. MY BRAKES ARE CONVERTED TO VACUUM ASSIST AND ARE VERY RELIABLE. EVEN THO THE SWAY AND ROLL IS SCARY. I RECOMMEND PUT A STOVEBOLT CAB ON A S10 OR MOTORHOME FRAME AND SUSPENSION.