Original sentence: " being the "AR" in "March".After his driving career was over, Rees was a founding member of March Engineering, his initials "A.He later became team boss of Shadow Racing Cars, and later co-founder of Arrows
Edited sentence: After his driving career was over, Rees co-founded March Engineering; his initials being the "AR" in "March", alongside Max Mosley, Graham Coaker and Robin Herd.He later became team principal of Shadow Racing Cars, and later still co-founded Arrows