68 kframe vs. 73 & up

I need to find whoever put my car together to start with, lol. It's pretty much the junkyard special from what I've been able to sort out so far. 67 VIN with 69 sheet metal and grille, F body 8.25 rear end complete with entire rear spring setup (rubber spring isolater axle mounts to boot), some kind of BBP front discs (caliper casting number matches a 73 Cuda, but I'm guessing it's probably also off the same F body, some mid 70's 318 with some giant radiator that I assuem came with the engine (maybe an A/C car that they didn't take the A/C with), and a 73 4 speed. "Custom" welded engine mounts (by that I mean they cut the original biscuit style off the K frame and transplated the spool mounts that came with the engine along with some nice angle iron and square tube to get them where they needed to be). It's fun going to the part store anymore, I've told them about 5 different cars so far when buying parts.