Has anyone here had a heater core put in one of these cars? If so did you do it yourself or did you have it put in? If you had it put in did it cast more or less than a grand? I just put one in and it now leaks at least 100 times as bad as it did before. I think I cracked one of the tubes where it goes into the core. I will be starting on the redo tomorrow and was looking for pointers. I just noticed my signature says I own a 5.0 which is true but this is my daughters SC.