The only bad thing about the Jag IRS is that the bushings are total sh*t. Yes, that is easy to solve, but I do worry a bit about using any parts made by British Leyland. Interestingly though, the old XJ chassis stayed in production until very recently, even underpinning an Aston Martin ( DB7?). It made it's debut in the mid 70's as a replacement for the old XKE. Also, it is a very common find in U Pull it's as most of these cars died an early death from electrical problems, and many sat in people's yards for years before being junked.