I am working with my buddy on my 64 FJ 45. We have already swap a 4 speed Chevy tranny to the already swapped Chevy 350 engine. He came into a problem where ,the gas tank was swapped out with a 69 FJ gas tank. Are gas tanks different in size between 64 and 69. We also have noticed the shifter is its way of the seats particularly shifter hitting the second section of the seats. It is 2/3 parts. Please forgive me I am a newbie. Thanks for any feedback or help.