embarrassing moments

[nvrdone]

So Sunday I had the truck out for a drive and I hear a loud bang under the truck and see something passing me going down the street. Turns out it was my harmonic balancer and lower pulley.
Come to find out that Chevy did not use a crankshaft bolt to hold the balancer on until about 1972 and I've got a 65 - 327.
Any way, after getting the truck home, finding a new balancer and pulley I drilled and tapped the nose end of the crank shaft.
With a new balancer bolted on and replacing the water pump - it was making noise. I'm back to enjoying the drive.
Anyone else have things like this happen ?