running Altec VotT A7 with scoops?

I'm still building my first system, which currently has two JBL-style 15" scoops for the lows. These A7s are exactly the same height, so at first it seemed like a great way to expand the stack. However, upon getting the A7s into my yard and seeing their condition, it's clear they would need a lot of work to be serviceable (like totally rebuilding the cabinets).

So the big question is, would these A7s even perform well with my scoops in any configuration? I already feel like I bit off more than I can chew with these, so before lugging all the cabs outside and rewiring the A7s (and pissing off the neighbors), I'd like to hear from anyone with experience running both types of cabs, or even theory behind running two different sub enclosure types together. I have other smaller builds to focus on finishing still, so I don't want to waste my efforts on what may end up being a useless distraction.

I'm happy to provide more info if that would help. Thanks!

I don't know if I'm up for building more scoops at this point, but am interested in doing something to boost my low mids. I had recently built a Bill Fitzmaurice Jack 12 cabinet with a 12" Eminence Deltalite II, but it really doesn't give me the kick I want. Sounds a bit muddy when playing 45s at moderate volumes. Don't know if there's still some speaker break-in that needs to happen in order to get the lower response or if I need to diagnose possible problems with the cabinet itself, but I think it's build pretty solid and airtight. 

Would those Speakerlab 15s be any good for building some basic yet effective low-mid boxes? Either reflex of horn-loaded (to better phase-match the BFM and CD horn I build a top box for). I'm not necessarily on a tight budget, but more of a "reduce, reuse, recycle" tip, haha. It's just kind of disheartening to wind up with some giant speaker cabinets that sound decent and then have no practical application for them.