came across a Peugeot road bike.it had custom work done to it. dropouts changed to campy 1010B.front fork was replaced with Columbus SP front fork.the frame had custom internal brake routing done to it.wondered if anyone on here could help identify the frame model?here is the serial # B81238711 really wanted to know why someone would go through all that for this Peugeot? ithanks

We won't be able to identify it by serial number alone. We'll need detailed pictures, and even then, it might be difficult to make a positive ID considering the similarities between some models and the modifications to your bike.