Thanks for the replies
Totally confused now.
I like the look of this 4.6 one. As I said already tornado chipped and done by RPI. By the sound of things this upgrade should help the cooling issues then.
The issue that now concerns me based on one of the replies is that the owner only did 150 miles last year and 600 the year before. Its a 1998 with 18000 on it so only like a 1000 a year mileage.
Thanks for your comments chaps