Sarge, I bought my rebuild kit from Cliff's High Performance - when I called I personally talked with Cliff himself and he spent about 10-15 minutes with me.  I described my engine specs and what I was going to do with the car and he suggested a different set of secondary metering rods and was able to include them (for a reasonable price) with the rebuild kit.  Through that discussion he felt that the primary jets and rods that came with the carb were appropriate so I didn't need to buy replacements for those.  So far I haven't been able to test out the secondaries a whole lot since I'm still breaking in the motor, but the low speed drivability is excellent so I think he was spot on for the primary side.  Q-jets are very tune-able if you're willing to change rods and jets since so many GM cars used them for widely different applications and there were tons of different varieties.  You just have to know which to use and where to get them.

First thing I'd do is to replace the hose from the fuel pump to the carb w/ a steel line.  There's a very good reason that they came that way from the factory.  Corvettes burn very well.  

If you don't want to do the steel line, at least replace the rubber hose w/ a high pressure hose designed for fuel injection cars. 

All of the suggested sources are very good.  The Q-jet is relatively easy to rebuild even tho it might seem a little daunting at the start.  Just get either or both of the suggested books and you should be able to do it.  Good luck.