Jaguar v12

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Hi, well i hope to build one of these in the near future, and ive recently been offered a jaguar 5.3l v12 engine with auto box. now i would have never thought of putting one of these in this car, but its beeing offered to me very cheaply, and i wondered if i had any use for it and then thought of a haynes roadster. Now i know this is a huge engine(dimensionally) but i am unable to find any dimensions of this on the internet. I also wondered if anyone has done reasearch into this before and does any one think i may have even a remote chance of getting one to fit in the roadster i plan on building