You know I was thinking that wouldn't such a bad swap to go for... Those Jags are nice comfortable rides, good brakes, etc...Just the v12 motors and electrical give you fits constantly... Fires, shorts, you name it... Throw a 1uz-fe in one and you might end up with a decent reliable ride... Alot less front end weight for sure as well with that swap...
Good luck, I hope you pull it off... Can you mate the stock tranny with an 1uz-fe motor successfully?