Have you access to any of the Old engine books..It lays out some mods for these intakes. If you want I can scan them for ya, and email them too you.
From what I have seen the mods are simple pop cycle stick dams and epoxy, mods to the divider walls etc.
All internal so you wont know it by looking at them.
There is a few people out there that can make these intakes a bunch better than factory thats for sure.
Looks like most no days that is doing class racing with maz wedge go with the indy bath tube intake. They run good, but dont have that look of a old factory intake.