Thanks for the advice so far.

I'll be putting on my old components (105 drivetrain with Ultegra rear derailleur) from a road bike I totaled ( I bought a brand new one as a replacement).

My road bike is a 56cm with 560mm TT and 100mm Stem. This setup fits me perfectly - So I'm going to try to match those measurements with the frames.

I won't be able to test ride them as none of my LBS sell them, so I'm basing the sizing off my current road bike.