Setting up a crankshaft: any pointers??

[hools100RS]

G'day everyone it's been a while since I last posted but thought that the topic deserved some considered and meaningful contributions. On removing the crankshaft from my '81 100 RS I've discovered major damage and have decided to replace the unit with one that is in known good standard condition.
Yep, a high speed oil starvation drama appears to be the cause, as on blowing out the oilways and galleries with an air hose I discovered a black flaky material that I reckon may have blocked the odd hole or two!(the bike is new to me and it's history unknown........... looked good on the outside but......!!!!!)
Any way.... setting up a crank...... main bearings and thrust washers......different colours........ its intimidating but I'm prepared to give it my best shot!!!!!
The cases have been cleaned and all is in readiness for the replacement..........
Can someone start me off?..........Help,,,,,,,,,,,Jeff or GSPD are you out there???!!!!!!!!!!!!