Thanks so much for all of your input. Here are the details. My Jaguar XJS had an engine fire that destroyed its V12 engine. I, like many other XJS owners, replaced the V12 engine with a V8 LT1 engine. Other XJS owners have replaced the V12 with the LT1 or similar V8 engine due to the numerous problems the V12 is known to have. Due to the large number of XJS owners that have so replaced their V12 engine, Jaguar clubs like Jag-Lovers has a forum called "Lumps" for these owners. Does this information affect or change any of your opinions? Thanks for your help.