How do you size a track frame compared to a road frame? I ride a 53 c-t-t/53.5 TT with a 14cm stem RB, and the track bike I am looking at is 51.5 c-t-t/52 TT. Would this be optimal, or can it work without looking like a franken-bike?

The RB has a 74 degree ST, and the track has a 75.5.