That's the direction i am leaning as well. I am trying to get as much under dash space as I possibly can since I am trying to smooth out the firewall for a super clean "how does this thing run" type of look. With the vintage air kit I figure I can safely move the wiper motor and all the electronics up under the dash. After looking at the link above the vintage air firewall block may just be the ticket for super clean smoothed look.
