Both of the seats are individual seats. I built the frame out of 1” tube and used 3/16” flat plate to drill the mount holes into. It’s a solid day of work. But I like knowing a passengers head/neck has proper head rest behind them if a rear is hit by something. The whiplash would be terrible with no head protection.This is exactly what I plan initially, but my two seats don't fit together. I thought if I could install just one.
It’s also nice having the seats a little higher off the floor for more comfort. Removable seats could easily be engineered if this is a more of a daily driver.