This thread might not be dead, but I understand that the body is cooling; please forgive me if this resurrection is unwelcome.
Anyways, I'm greatly impressed by your scratch-building abilities. You've definitely captured the ABV through your extensive conversion; truly an inspiring display of skill.
When I was a boot Marine at Ft. Knox, ABV's were brand new there and the coolest thing on the block. The "Tangerines" (tanker/engineer-Marines) kept breaking them on the driving course because they continually challenged the A-fruit curse.
In the future, as a Tank Commander, I was lucky enough to run alongside them a few times. The operators didn't break them with the same frequency as those at the school house, but I still got a kick out of how they treated (mistreated) their rides. My favorite ABV related memory was in Twenty Nine Palms when some stand-in ammo tech (he was like a comm-dude or something) and his droogs tried to give me a MICLIC; my Platoon Commander wouldn't let me have it. Surely, there must have been some way to launch it off an M1A1.
Anyway, digressions aside, this build is nothing more than impressive. Please forgive my rambling and reminiscing (though "reminiscing" makes it sound like my memories are far in the past). Great job!
For the record, I never stole parts from unguarded ABVs for my M1A1.