okay say you were in my situation:
broke.
building up a fixed gear but would have to wait two months or so until you had all the cash to finish it.
you ride a 58cm road bike, building up a 56cm track bike.
A conversion is for sale (150) but is a size 54cm.
You also were about to leave your apartment to possibly purchase a 58cm road bike for 75 anyway.

Is it worth to quickly jump ship to fixed even if it is 'too' small? You think it would be comfortable enough if I just raised the seattube higher? I don't mind a low stem, I always ride aggressive anyway.

I'm making my decision in about 30minutes when my girl comes to pick me up and drive me to either the roadbike or the fg.