Man, if time isn't an issue, then wait and build your project around the foundation of a NICE TRACK FRAME (modern or vintage) instead of this one. You are making an orange into an apple. Since you are starting from scratch, just buy a really nice apple to start with. Remember, conversions were popular because people already had old road bikes and stuff laying around and they stripped those bikes down to the bare minimum. They were Franken-bikes. The bike messengers of the 80s and 90s (the ones that were the prototypes of the scene) used real track frames.

This project is sort of like the guy that spends an hour in the bathroom trying to make it look like he just rolled out of bed. Or buying a pre-worn out and faded hat from Abercrombie.

Do what you want, man. You asked for advice and I gave you more than you asked for.