Hi Aussie, I've lived with Big Block (427 & 454 ci. in.) Corvettes all my adult life & have learned some of the problems that make them handle funny. I have driven them up to 140 MPH, mostly on race tracks, & never had problems with the rear end not tracking properly. Corvettes built between '63 & '82 had the same basic frame/suspension system and are prone to two common problems. First, age deteriorates the rear trailing arm bushings. Second, in the colder climates where gobbs of salt are used on the roads, rust will weaken the frame at the attaching point of the trailing arms. Both of there conditions will cause the the rear end to wander or "steer" from the rear. A properly maintained & aligned rear suspension in a Corvette will produce cornering results that exceed the capability of our trusty 300's. 300'ly yours, Jim Bartuska [Non-text portions of this message have been removed]