it looks like it's either a nishiki or a shogun TT bike with a 24 inch front wheel and not a 650. putting a larger front wheel on would seriously hurt the steering. assuming that the front wheel and fork are what was originally on the frame, any normal sized crank should be fine as the frame builder most likely accounted for the smaller front wheel (note that the head tube angle looks to be at about the same angle as a normal road bike).
Zack, do yourself a favor and get a real track hub if you're going to go fixed on it. i did the cog/bb lockring thing for a while and it worked, but i also was running front and rear brakes the whole time and was using a 52:16 ratio. needless to say, i wasn't leg-locking. of you decide to run brakes, be careful you don't flip the bike over by grabbing the front too hard. and maybe go for riser bars and maybe a different if you plan on riding that for more than a few hours at a time. that bike looks pretty sick, by the way, and pursuits are fun to ride.