"Ls" swapping my 1984 Thunderbird élan July 09, 2019, 05:45:56 PM This is my 1984 Thunderbird élan i bought last Christmas eve, for $450. I bought it as roller having a 5.3l already put together by me for a fairmont I was gonna put it in but this car popped up and it was to good to pass up. The car was a 5.0l élan with a c4/3? I want to say it had? Now it has currently a 5.3l and 4l70e I will be adding more pictures and info on the build as a post them up.