replace alternator 2007 yaris

[yak]

G'day I know this is an old post but, the 14 mm bolt is extremely difficult to access from the top...what do you suggest for tools ??
I'm using 3/8 ratchet w/14mm six point socket but there isn't enough engagement for the ratchet to socket; it hits the idler pulley, no room for a regular extension
ps I have removed the A/C line bracket as noted in the service manual
cheers & thanx
yak