A friend of mine is about to buy an auctioned FJ 40. He is going to swap the engine (although I insisted on keeping the original 2F) but any ways its his call. He wants to go for a lighter petrol engine with original automatic transmission and install CNG in it. As for our knowledge, we have 2 options. 3400 cc 5vz or 2700 cc 2TR-Fe (My vote is for 5vz)
Which one is a better option and any other engines that should be considered? Keeping in mind all the important factors
The Jeep will be used for tours etc and occassional light off roading. So nothing hardcore.
Looking forward for expert and Pro opinion.