Help Identify this Bike, please.

Was wondering if the collective could help me figure out more info about this frame/crankset/forks/bars. My search results keep coming up empty.

Kink frame with K450 ACA15C004294 stamped on the BB. Seems to be a 20 or 20.5" TT.

Cranks are 175mm and have something stamped on it. Maybe 1504175.

I couldn't find any distinguishing marks on the bars or forks.

I added the seat, seatpost, wheels, brakes and grips, but other than that, was this an old complete, or was it a custom build? I couldn't find any info from the stamps.