You don't want a theft car unless you really know what you're getting into. More often than not, they're more trouble then they're worth. And the more these shitheads "yard drive" the goddamn thing, the harder it will be to repair. Bad heads mean coolant in the combustion chambers, which means scoring of the block, which leads to stroking, boring, cussing, pissing, shitting of bricks, and purchasing new autos. And valve jobs as well. Poor thing is probably beat to shit from the joyriding; don't discount the possibility of weakened brake lines, warped rotors, damaged suspension comonents, flat spots ground onto tires, and all the other oddments that result from grossly unskilled balls-out motoring by the class of lowlifes who steal vehicles for this purpose rather than beat their own machines, since they most likely drive '87 corrola wagons that would steadily lose parts if taken over 70 MPH.
@ Bons: My Buick LeSabre is an "old man's car" (or so my friends tell me) but it cranks out 10 more HP than my '84 Corvette (that's factory, nevermind my K&N low-restriction air cleaner and platinum plugs, etc) and is perfectly capable of being driven madly, although the passengers are gauranteed to get seasick thanks to it being sprung like a Barcalounger. (Rather than lay rubber, the front end bounces like a basket ball if you tromp on it real good; peeling out requires a touchy foot. Tell me it doesn't have an excess of torque!?!) But one keeps a careful eye on the tach and an ear for the tires when one drives one's own car briskly; when it's somebody elses, they could care less. Very sorry to hear your Buick met a sad end, mine has proven indrestructible; after a bit of a bingle with an idjit who followed his wife through an intersection and ignored my 5,000-pound charriot, a buddy of mine dubbed it the "B.U.I.C.K.: Big Ugly Indestructible Car Killer". I drove home, he went to the hospital(moral: Always wear your safety belt, especially if you have soft tissue injury in your back) and his car left on the flatty.