No I have not tried this in a 4runner but my buddy did it in his drag talon. He is about 6'4" and was so tall he would have to pop the moon roof to let his head fit to be fully comfortable. He also moved his seat brackets back about 4"s I believe. Not exactly remembering how he did it but I think he just used some brackets made for aftermarket seats and moved them back with new holes he drilled but not sure if they make universal seat mounting brackets for out seats. maybe drill new holes in floor board and move them back. Good luck.