When I installed my empeg in my Isuzu Rodeo, I ran into the same thing. The head unit is attached using two L shaped brackets which are then screwed into the dash framing from the front. What I eneded up doing, was getting two pan head bolts that had a low profile, and mounted the brackets to the sled. To prevent the bolts from blocking the empeg, I just put the assembled sled on the vice, and wacked the bolt with a hammer from the inside until it was flush..