Project: "Daddy's Cool Cool Green Green Car" Build

Been a while since an update, so if anyone is interested, here's a quick update and a couple of questions:

First, I found a local body guy here in NJ who turns out to be one of those hidden gems....He's a collision shop who happens to also do a few hot rods and muscle cars as well....Checked out his stuff and he's the best I've seen in a long while....He's been in the business over 30 years and has lots of the old school skills I've been looking for.

Second, an old friend who I haven't spoken to in years just bought a 74 Dart and, along with it he's getting a 73 or 74 Scamp (he's not sure which year) as a donor car....Supposedly it's an original V-8 car w/ an automatic....I haven't spoken to this dude in over 20 years and he knew of my car through Facebook, so he offered the Scamp to me for free as soon as it hits his driveway....The only problem is that he's an 8 hour drive from me!

My questions are, how do I identify a V-8 K-Frame compared to a /6?....If I remember, there is a washer tacked somewhere....Where should it be, and if it's gone, how else can it be identified?

Finally, did all 73 or 74 V-8 cars come with factory discs, and what year was the start of the BBP?

Thanks!