Bad Motor, what are my options

[Austin C10]

My 350 small block seems shot. At the least it needs a valve job, but might also need rings. There has been lots of pinging, buring oil and water, fouled plugs, loss of compression, and backfiring through the carb. I either need to move on or get it up and running. So I need a little advice.

First of all, I'm pretty limited on replacing the motor myself. Just not going to happen at this time in my life. Would it be better to get something stock and have a good engine shop replace it, or should I consider having the current motor rebuilt?

The latter option has a certain appeal as I might be able to add some performance enhancements. What should I consider when it comes to performance upgrades?

With either of these options, I'm in the San Fran Bay area. Anyone know of good resources (machine shop, engine shop, salvage/junk yards) up here?

And lastly, what are the options for someone who just doesn't have the time/money and wants to get out from underneath this? I hate this option, b/c my family has a love affair with this truck, and I've already spent some time/money (including a trans rebuild) on it.